172157852 has 24 divisors (see below), whose sum is σ = 322049952. Its totient is φ = 80326400.

The previous prime is 172157809. The next prime is 172157897. The reversal of 172157852 is 258751271.

172157852 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19049 + ... + 26592.

It is an arithmetic number, because the mean of its divisors is an integer number (13418748).

Almost surely, 2^172157852 is an apocalyptic number.

It is an amenable number.

172157852 is a deficient number, since it is larger than the sum of its proper divisors (149892100).

172157852 is a wasteful number, since it uses less digits than its factorization.

172157852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45709 (or 45707 counting only the distinct ones).

The product of its digits is 39200, while the sum is 38.

The square root of 172157852 is about 13120.8937195604. The cubic root of 172157852 is about 556.2998529236.

The spelling of 172157852 in words is "one hundred seventy-two million, one hundred fifty-seven thousand, eight hundred fifty-two".