172272231 has 16 divisors (see below), whose sum is σ = 266315520. Its totient is φ = 109854360.

The previous prime is 172272223. The next prime is 172272241. The reversal of 172272231 is 132272271.

It is not a de Polignac number, because 172272231 - 2³ = 172272223 is a prime.

It is a super-2 number, since 2×172272231² = 59355443147434722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 172272195 and 172272204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172272241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 138085 + ... + 139326.

It is an arithmetic number, because the mean of its divisors is an integer number (16644720).

Almost surely, 2^172272231 is an apocalyptic number.

172272231 is a deficient number, since it is larger than the sum of its proper divisors (94043289).

172272231 is a wasteful number, since it uses less digits than its factorization.

172272231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277443 (or 277437 counting only the distinct ones).

The product of its digits is 2352, while the sum is 27.

The square root of 172272231 is about 13125.2516547303. The cubic root of 172272231 is about 556.4230246407.

The spelling of 172272231 in words is "one hundred seventy-two million, two hundred seventy-two thousand, two hundred thirty-one".