30725133 has 16 divisors (see below), whose sum is σ = 42415296. Its totient is φ = 19768320.

The previous prime is 30725111. The next prime is 30725153. The reversal of 30725133 is 33152703.

It is not a de Polignac number, because 30725133 - 2⁸ = 30724877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30725153) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13485 + ... + 15597.

It is an arithmetic number, because the mean of its divisors is an integer number (2650956).

Almost surely, 2^30725133 is an apocalyptic number.

It is an amenable number.

30725133 is a deficient number, since it is larger than the sum of its proper divisors (11690163).

30725133 is a wasteful number, since it uses less digits than its factorization.

30725133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2284.

The product of its (nonzero) digits is 1890, while the sum is 24.

The square root of 30725133 is about 5543.0256178372. The cubic root of 30725133 is about 313.2068539120.

Adding to 30725133 its reverse (33152703), we get a palindrome (63877836).

The spelling of 30725133 in words is "thirty million, seven hundred twenty-five thousand, one hundred thirty-three".