172221252 has 24 divisors (see below), whose sum is σ = 459256896. Its totient is φ = 49206048.

The previous prime is 172221241. The next prime is 172221281. The reversal of 172221252 is 252122271.

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, 1025043 + ... + 1025210.

It is an arithmetic number, because the mean of its divisors is an integer number (19135704).

Almost surely, 2^172221252 is an apocalyptic number.

172221252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

172221252 is an abundant number, since it is smaller than the sum of its proper divisors (287035644).

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

172221252 is a wasteful number, since it uses less digits than its factorization.

172221252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2050267 (or 2050265 counting only the distinct ones).

The product of its digits is 1120, while the sum is 24.

The square root of 172221252 is about 13123.3094911307. The cubic root of 172221252 is about 556.3681334418.

The spelling of 172221252 in words is "one hundred seventy-two million, two hundred twenty-one thousand, two hundred fifty-two".