30642431 has 2 divisors, whose sum is σ = 30642432. Its totient is φ = 30642430.

The previous prime is 30642419. The next prime is 30642439. The reversal of 30642431 is 13424603.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 30642431 - 2¹⁰ = 30641407 is a prime.

It is a super-2 number, since 2×30642431² = 1877917155179522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 30642397 and 30642406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30642439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15321215 + 15321216.

It is an arithmetic number, because the mean of its divisors is an integer number (15321216).

Almost surely, 2^30642431 is an apocalyptic number.

30642431 is a deficient number, since it is larger than the sum of its proper divisors (1).

30642431 is an equidigital number, since it uses as much as digits as its factorization.

30642431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 30642431 is about 5535.5605858847. The cubic root of 30642431 is about 312.9255846256.

The spelling of 30642431 in words is "thirty million, six hundred forty-two thousand, four hundred thirty-one".