52161507 has 6 divisors (see below), whose sum is σ = 75344412. Its totient is φ = 34774332.

The previous prime is 52161503. The next prime is 52161533. The reversal of 52161507 is 70516125.

It is not a de Polignac number, because 52161507 - 2² = 52161503 is a prime.

It is a super-2 number, since 2×52161507² = 5441645625022098, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (52161503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2897853 + ... + 2897870.

It is an arithmetic number, because the mean of its divisors is an integer number (12557402).

Almost surely, 2^52161507 is an apocalyptic number.

52161507 is a deficient number, since it is larger than the sum of its proper divisors (23182905).

52161507 is a wasteful number, since it uses less digits than its factorization.

52161507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5795729 (or 5795726 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 27.

The square root of 52161507 is about 7222.2923646167. The cubic root of 52161507 is about 373.6371436605.

The spelling of 52161507 in words is "fifty-two million, one hundred sixty-one thousand, five hundred seven".