172251224 has 16 divisors (see below), whose sum is σ = 323136000. Its totient is φ = 86081632.

The previous prime is 172251197. The next prime is 172251227. The reversal of 172251224 is 422152271.

It is a junction number, because it is equal to n+sod(n) for n = 172251193 and 172251202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172251227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16169 + ... + 24615.

It is an arithmetic number, because the mean of its divisors is an integer number (20196000).

Almost surely, 2^172251224 is an apocalyptic number.

It is an amenable number.

172251224 is a deficient number, since it is larger than the sum of its proper divisors (150884776).

172251224 is a wasteful number, since it uses less digits than its factorization.

172251224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11002 (or 10998 counting only the distinct ones).

The product of its digits is 2240, while the sum is 26.

The square root of 172251224 is about 13124.4513790101. The cubic root of 172251224 is about 556.4004068464.

The spelling of 172251224 in words is "one hundred seventy-two million, two hundred fifty-one thousand, two hundred twenty-four".