172151020 has 24 divisors (see below), whose sum is σ = 380545200. Its totient is φ = 65236032.

The previous prime is 172151017. The next prime is 172151051. The reversal of 172151020 is 20151271.

It is a Harshad number since it is a multiple of its sum of digits (19).

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, 226135 + ... + 226894.

It is an arithmetic number, because the mean of its divisors is an integer number (15856050).

Almost surely, 2^172151020 is an apocalyptic number.

172151020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172151020 is an abundant number, since it is smaller than the sum of its proper divisors (208394180).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

172151020 is a wasteful number, since it uses less digits than its factorization.

172151020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453057 (or 453055 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 19.

The square root of 172151020 is about 13120.6333688584. The cubic root of 172151020 is about 556.2924939973.

The spelling of 172151020 in words is "one hundred seventy-two million, one hundred fifty-one thousand, twenty".