172271236 has 6 divisors (see below), whose sum is σ = 301474670. Its totient is φ = 86135616.

The previous prime is 172271213. The next prime is 172271243. The reversal of 172271236 is 632172271.

It can be written as a sum of positive squares in only one way, i.e., 136749636 + 35521600 = 11694^2 + 5960^2 .

It is a junction number, because it is equal to n+sod(n) for n = 172271198 and 172271207.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21533901 + ... + 21533908.

Almost surely, 2^172271236 is an apocalyptic number.

It is an amenable number.

172271236 is a deficient number, since it is larger than the sum of its proper divisors (129203434).

172271236 is a wasteful number, since it uses less digits than its factorization.

172271236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43067813 (or 43067811 counting only the distinct ones).

The product of its digits is 7056, while the sum is 31.

The square root of 172271236 is about 13125.2137506404. The cubic root of 172271236 is about 556.4219533866.

The spelling of 172271236 in words is "one hundred seventy-two million, two hundred seventy-one thousand, two hundred thirty-six".