30497257 has 12 divisors (see below), whose sum is σ = 35648256. Its totient is φ = 26013960.

The previous prime is 30497251. The next prime is 30497263. The reversal of 30497257 is 75279403.

It is an interprime number because it is at equal distance from previous prime (30497251) and next prime (30497263).

It is not a de Polignac number, because 30497257 - 2³ = 30497249 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30497251) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9532 + ... + 12322.

It is an arithmetic number, because the mean of its divisors is an integer number (2970688).

Almost surely, 2^30497257 is an apocalyptic number.

It is an amenable number.

30497257 is a deficient number, since it is larger than the sum of its proper divisors (5150999).

30497257 is a wasteful number, since it uses less digits than its factorization.

30497257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3028 (or 3021 counting only the distinct ones).

The product of its (nonzero) digits is 52920, while the sum is 37.

The square root of 30497257 is about 5522.4321634584. The cubic root of 30497257 is about 312.4306218251.

The spelling of 30497257 in words is "thirty million, four hundred ninety-seven thousand, two hundred fifty-seven".