75640531 has 16 divisors (see below), whose sum is σ = 83825280. Its totient is φ = 67947520.

The previous prime is 75640529. The next prime is 75640553. The reversal of 75640531 is 13504657.

It is a cyclic number.

It is not a de Polignac number, because 75640531 - 2¹ = 75640529 is a prime.

It is a super-2 number, since 2×75640531² = 11442979859923922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 75640493 and 75640502.

It is not an unprimeable number, because it can be changed into a prime (75640561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31605 + ... + 33913.

It is an arithmetic number, because the mean of its divisors is an integer number (5239080).

Almost surely, 2^75640531 is an apocalyptic number.

75640531 is a deficient number, since it is larger than the sum of its proper divisors (8184749).

75640531 is a wasteful number, since it uses less digits than its factorization.

75640531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2414.

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 75640531 is about 8697.1564893360. The cubic root of 75640531 is about 422.9134749913.

The spelling of 75640531 in words is "seventy-five million, six hundred forty thousand, five hundred thirty-one".