30523725 has 18 divisors (see below), whose sum is σ = 54671786. Its totient is φ = 16279200.

The previous prime is 30523723. The next prime is 30523733. The reversal of 30523725 is 52732503.

It can be written as a sum of positive squares in 3 ways, for example, as 86436 + 30437289 = 294^2 + 5517^2 .

It is not a de Polignac number, because 30523725 - 2¹ = 30523723 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30523723) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 67606 + ... + 68055.

Almost surely, 2^30523725 is an apocalyptic number.

It is an amenable number.

30523725 is a deficient number, since it is larger than the sum of its proper divisors (24148061).

30523725 is a wasteful number, since it uses less digits than its factorization.

30523725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135677 (or 135669 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 27.

The square root of 30523725 is about 5524.8280516230. The cubic root of 30523725 is about 312.5209799248.

The spelling of 30523725 in words is "thirty million, five hundred twenty-three thousand, seven hundred twenty-five".