30926431 has 2 divisors, whose sum is σ = 30926432. Its totient is φ = 30926430.

The previous prime is 30926407. The next prime is 30926449. The reversal of 30926431 is 13462903.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 30926431 - 2⁷ = 30926303 is a prime.

It is a super-2 number, since 2×30926431² = 1912888268795522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 30926431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30926491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15463215 + 15463216.

It is an arithmetic number, because the mean of its divisors is an integer number (15463216).

Almost surely, 2^30926431 is an apocalyptic number.

30926431 is a deficient number, since it is larger than the sum of its proper divisors (1).

30926431 is an equidigital number, since it uses as much as digits as its factorization.

30926431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 30926431 is about 5561.1537472003. The cubic root of 30926431 is about 313.8893649207.

The spelling of 30926431 in words is "thirty million, nine hundred twenty-six thousand, four hundred thirty-one".