172499955 has 32 divisors (see below), whose sum is σ = 291475200. Its totient is φ = 86873472.

The previous prime is 172499953. The next prime is 172499981. The reversal of 172499955 is 559994271.

It is not a de Polignac number, because 172499955 - 2¹ = 172499953 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 172499898 and 172499907.

It is not an unprimeable number, because it can be changed into a prime (172499953) 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 31 ways as a sum of consecutive naturals, for example, 107217 + ... + 108813.

It is an arithmetic number, because the mean of its divisors is an integer number (9108600).

Almost surely, 2^172499955 is an apocalyptic number.

172499955 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

172499955 is a deficient number, since it is larger than the sum of its proper divisors (118975245).

172499955 is a wasteful number, since it uses less digits than its factorization.

172499955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2003.

The product of its digits is 1020600, while the sum is 51.

The square root of 172499955 is about 13133.9238234429. The cubic root of 172499955 is about 556.6680923545.

The spelling of 172499955 in words is "one hundred seventy-two million, four hundred ninety-nine thousand, nine hundred fifty-five".