30431641 has 2 divisors, whose sum is σ = 30431642. Its totient is φ = 30431640.

The previous prime is 30431633. The next prime is 30431651. The reversal of 30431641 is 14613403.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30206016 + 225625 = 5496^2 + 475^2 .

It is a cyclic number.

It is not a de Polignac number, because 30431641 - 2³ = 30431633 is a prime.

It is not a weakly prime, because it can be changed into another prime (30431651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15215820 + 15215821.

It is an arithmetic number, because the mean of its divisors is an integer number (15215821).

Almost surely, 2^30431641 is an apocalyptic number.

It is an amenable number.

30431641 is a deficient number, since it is larger than the sum of its proper divisors (1).

30431641 is an equidigital number, since it uses as much as digits as its factorization.

30431641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 30431641 is about 5516.4881038574. The cubic root of 30431641 is about 312.2063921753.

The spelling of 30431641 in words is "thirty million, four hundred thirty-one thousand, six hundred forty-one".