30725573 has 4 divisors (see below), whose sum is σ = 30739500. Its totient is φ = 30711648.

The previous prime is 30725561. The next prime is 30725581. The reversal of 30725573 is 37552703.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 37552703 = 631 ⋅59513.

It can be written as a sum of positive squares in 2 ways, for example, as 15225604 + 15499969 = 3902^2 + 3937^2 .

It is a cyclic number.

It is not a de Polignac number, because 30725573 - 2⁶ = 30725509 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 (30725543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2840 + ... + 8337.

It is an arithmetic number, because the mean of its divisors is an integer number (7684875).

Almost surely, 2^30725573 is an apocalyptic number.

It is an amenable number.

30725573 is a deficient number, since it is larger than the sum of its proper divisors (13927).

30725573 is a wasteful number, since it uses less digits than its factorization.

30725573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13926.

The product of its (nonzero) digits is 22050, while the sum is 32.

The square root of 30725573 is about 5543.0653072104. The cubic root of 30725573 is about 313.2083490003.

The spelling of 30725573 in words is "thirty million, seven hundred twenty-five thousand, five hundred seventy-three".