30730157525 has 18 divisors (see below), whose sum is σ = 40478751270. Its totient is φ = 23137995520.

The previous prime is 30730157519. The next prime is 30730157537. The reversal of 30730157525 is 52575103703.

It can be written as a sum of positive squares in 9 ways, for example, as 4181691556 + 26548465969 = 64666^2 + 162937^2 .

It is not a de Polignac number, because 30730157525 - 2²⁴ = 30713380309 is a prime.

It is a super-2 number, since 2×30730157525² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2119430 + ... + 2133879.

It is an arithmetic number, because the mean of its divisors is an integer number (2248819515).

Almost surely, 2^30730157525 is an apocalyptic number.

It is an amenable number.

30730157525 is a deficient number, since it is larger than the sum of its proper divisors (9748593745).

30730157525 is a wasteful number, since it uses less digits than its factorization.

30730157525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4253353 (or 4253331 counting only the distinct ones).

The product of its (nonzero) digits is 110250, while the sum is 38.

The spelling of 30730157525 in words is "thirty billion, seven hundred thirty million, one hundred fifty-seven thousand, five hundred twenty-five".