30372931 has 16 divisors (see below), whose sum is σ = 32979744. Its totient is φ = 27869184.

The previous prime is 30372919. The next prime is 30372971. The reversal of 30372931 is 13927303.

It is a 14-Lehmer number, since φ(30372931) divides (30372931-1)¹⁴.

It is a cyclic number.

It is not a de Polignac number, because 30372931 - 2⁷ = 30372803 is a prime.

It is a super-2 number, since 2×30372931² = 1845029875061522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 30372931.

It is not an unprimeable number, because it can be changed into a prime (30372971) 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, 186256 + ... + 186418.

It is an arithmetic number, because the mean of its divisors is an integer number (2061234).

Almost surely, 2^30372931 is an apocalyptic number.

30372931 is a deficient number, since it is larger than the sum of its proper divisors (2606813).

30372931 is a wasteful number, since it uses less digits than its factorization.

30372931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390.

The product of its (nonzero) digits is 3402, while the sum is 28.

The square root of 30372931 is about 5511.1642145739. The cubic root of 30372931 is about 312.0054890279.

The spelling of 30372931 in words is "thirty million, three hundred seventy-two thousand, nine hundred thirty-one".