52072731 has 6 divisors (see below), whose sum is σ = 75216180. Its totient is φ = 34715148.

The previous prime is 52072729. The next prime is 52072753. The reversal of 52072731 is 13727025.

52072731 is a `hidden beast` number, since 520 + 72 + 73 + 1 = 666.

It is not a de Polignac number, because 52072731 - 2¹ = 52072729 is a prime.

It is a super-2 number, since 2×52072731² = 5423138627596722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 52072695 and 52072704.

It is not an unprimeable number, because it can be changed into a prime (52072721) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2892921 + ... + 2892938.

It is an arithmetic number, because the mean of its divisors is an integer number (12536030).

Almost surely, 2^52072731 is an apocalyptic number.

52072731 is a deficient number, since it is larger than the sum of its proper divisors (23143449).

52072731 is a wasteful number, since it uses less digits than its factorization.

52072731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5785865 (or 5785862 counting only the distinct ones).

The product of its (nonzero) digits is 2940, while the sum is 27.

The square root of 52072731 is about 7216.1437762838. The cubic root of 52072731 is about 373.4250533751.

Adding to 52072731 its reverse (13727025), we get a palindrome (65799756).

The spelling of 52072731 in words is "fifty-two million, seventy-two thousand, seven hundred thirty-one".