172223925 has 24 divisors (see below), whose sum is σ = 285565056. Its totient is φ = 91587840.

The previous prime is 172223917. The next prime is 172223939. The reversal of 172223925 is 529322271.

It is not a de Polignac number, because 172223925 - 2³ = 172223917 is a prime.

It is a super-2 number, since 2×172223925² = 59322160684811250, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24397 + ... + 30653.

It is an arithmetic number, because the mean of its divisors is an integer number (11898544).

Almost surely, 2^172223925 is an apocalyptic number.

172223925 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

172223925 is a deficient number, since it is larger than the sum of its proper divisors (113341131).

172223925 is a wasteful number, since it uses less digits than its factorization.

172223925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6637 (or 6632 counting only the distinct ones).

The product of its digits is 15120, while the sum is 33.

The square root of 172223925 is about 13123.4113324242. The cubic root of 172223925 is about 556.3710118406.

The spelling of 172223925 in words is "one hundred seventy-two million, two hundred twenty-three thousand, nine hundred twenty-five".