52540731 has 12 divisors (see below), whose sum is σ = 78703352. Its totient is φ = 35026992.

The previous prime is 52540723. The next prime is 52540751. The reversal of 52540731 is 13704525.

It is a happy number.

52540731 is a `hidden beast` number, since 52 + 540 + 73 + 1 = 666.

It is not a de Polignac number, because 52540731 - 2³ = 52540723 is a prime.

It is a super-2 number, since 2×52540731² = 5521056828028722, which contains 22 as substring.

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

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 52540695 and 52540704.

It is not an unprimeable number, because it can be changed into a prime (52540751) 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, 107866 + ... + 108351.

Almost surely, 2^52540731 is an apocalyptic number.

52540731 is a deficient number, since it is larger than the sum of its proper divisors (26162621).

52540731 is an equidigital number, since it uses as much as digits as its factorization.

52540731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216232 (or 216220 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 52540731 is about 7248.4985341793. The cubic root of 52540731 is about 374.5404290154.

The spelling of 52540731 in words is "fifty-two million, five hundred forty thousand, seven hundred thirty-one".