53208909 has 12 divisors (see below), whose sum is σ = 82769596. Its totient is φ = 32743872.

The previous prime is 53208907. The next prime is 53208937. The reversal of 53208909 is 90980235.

It can be written as a sum of positive squares in 2 ways, for example, as 23068809 + 30140100 = 4803^2 + 5490^2 .

It is not a de Polignac number, because 53208909 - 2¹ = 53208907 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53208901) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 227272 + ... + 227505.

Almost surely, 2^53208909 is an apocalyptic number.

It is an amenable number.

53208909 is a deficient number, since it is larger than the sum of its proper divisors (29560687).

53208909 is a wasteful number, since it uses less digits than its factorization.

53208909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454796 (or 454793 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 53208909 is about 7294.4437073707. The cubic root of 53208909 is about 376.1214641717.

The spelling of 53208909 in words is "fifty-three million, two hundred eight thousand, nine hundred nine".