53161515 has 40 divisors (see below), whose sum is σ = 103969008. Its totient is φ = 25773120.

The previous prime is 53161483. The next prime is 53161517. The reversal of 53161515 is 51516135.

53161515 is a `hidden beast` number, since 5 + 31 + 615 + 15 = 666.

It is not a de Polignac number, because 53161515 - 2⁵ = 53161483 is a prime.

It is a super-2 number, since 2×53161515² = 5652293354190450, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (53161517) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1512 + ... + 10421.

Almost surely, 2^53161515 is an apocalyptic number.

53161515 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

53161515 is a deficient number, since it is larger than the sum of its proper divisors (50807493).

53161515 is a wasteful number, since it uses less digits than its factorization.

53161515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11961 (or 11952 counting only the distinct ones).

The product of its digits is 2250, while the sum is 27.

The square root of 53161515 is about 7291.1943466074. The cubic root of 53161515 is about 376.0097585931.

The spelling of 53161515 in words is "fifty-three million, one hundred sixty-one thousand, five hundred fifteen".