30640732531 has 2 divisors, whose sum is σ = 30640732532. Its totient is φ = 30640732530.

The previous prime is 30640732487. The next prime is 30640732541. The reversal of 30640732531 is 13523704603.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 30640732531 - 2⁷ = 30640732403 is a prime.

It is a super-3 number, since 3×30640732531³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (30640732541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15320366265 + 15320366266.

It is an arithmetic number, because the mean of its divisors is an integer number (15320366266).

Almost surely, 2^30640732531 is an apocalyptic number.

30640732531 is a deficient number, since it is larger than the sum of its proper divisors (1).

30640732531 is an equidigital number, since it uses as much as digits as its factorization.

30640732531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 34.

The spelling of 30640732531 in words is "thirty billion, six hundred forty million, seven hundred thirty-two thousand, five hundred thirty-one".