53209188 has 18 divisors (see below), whose sum is σ = 134501094. Its totient is φ = 17736384.

The previous prime is 53209183. The next prime is 53209193. The reversal of 53209188 is 88190235.

53209188 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (53209183) and next prime (53209193).

It can be written as a sum of positive squares in only one way, i.e., 52533504 + 675684 = 7248^2 + 822^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 1478033 = 53209188 / (5 + 3 + 2 + 0 + 9 + 1 + 8 + 8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53209183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 738981 + ... + 739052.

It is an arithmetic number, because the mean of its divisors is an integer number (7472283).

Almost surely, 2^53209188 is an apocalyptic number.

It is an amenable number.

53209188 is an abundant number, since it is smaller than the sum of its proper divisors (81291906).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

53209188 is a wasteful number, since it uses less digits than its factorization.

53209188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1478043 (or 1478038 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 53209188 is about 7294.4628314907. The cubic root of 53209188 is about 376.1221215660.

The spelling of 53209188 in words is "fifty-three million, two hundred nine thousand, one hundred eighty-eight".