53251515 has 24 divisors (see below), whose sum is σ = 93206880. Its totient is φ = 28122624.

The previous prime is 53251507. The next prime is 53251519. The reversal of 53251515 is 51515235.

It is not a de Polignac number, because 53251515 - 2³ = 53251507 is a prime.

It is not an unprimeable number, because it can be changed into a prime (53251519) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1110 + ... + 10379.

It is an arithmetic number, because the mean of its divisors is an integer number (3883620).

Almost surely, 2^53251515 is an apocalyptic number.

53251515 is a deficient number, since it is larger than the sum of its proper divisors (39955365).

53251515 is a wasteful number, since it uses less digits than its factorization.

53251515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11603 (or 11600 counting only the distinct ones).

The product of its digits is 3750, while the sum is 27.

The square root of 53251515 is about 7297.3635650144. The cubic root of 53251515 is about 376.2218280397.

The spelling of 53251515 in words is "fifty-three million, two hundred fifty-one thousand, five hundred fifteen".