53149805 has 8 divisors (see below), whose sum is σ = 63982872. Its totient is φ = 42384448.

The previous prime is 53149801. The next prime is 53149807. The reversal of 53149805 is 50894135.

It can be written as a sum of positive squares in 4 ways, for example, as 2184484 + 50965321 = 1478^2 + 7139^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 53149805 - 2² = 53149801 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53149801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15182 + ... + 18351.

It is an arithmetic number, because the mean of its divisors is an integer number (7997859).

Almost surely, 2^53149805 is an apocalyptic number.

It is an amenable number.

53149805 is a deficient number, since it is larger than the sum of its proper divisors (10833067).

53149805 is a wasteful number, since it uses less digits than its factorization.

53149805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33855.

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 53149805 is about 7290.3912789370. The cubic root of 53149805 is about 375.9821484093.

The spelling of 53149805 in words is "fifty-three million, one hundred forty-nine thousand, eight hundred five".