172448731 has 32 divisors (see below), whose sum is σ = 236597760. Its totient is φ = 121637376.

The previous prime is 172448723. The next prime is 172448737. The reversal of 172448731 is 137844271.

It is not a de Polignac number, because 172448731 - 2³ = 172448723 is a prime.

It is a super-2 number, since 2×172448731² = 59477129647020722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (172448737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26460 + ... + 32326.

It is an arithmetic number, because the mean of its divisors is an integer number (7393680).

Almost surely, 2^172448731 is an apocalyptic number.

172448731 is a deficient number, since it is larger than the sum of its proper divisors (64149029).

172448731 is a wasteful number, since it uses less digits than its factorization.

172448731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5923.

The product of its digits is 37632, while the sum is 37.

The square root of 172448731 is about 13131.9736140460. The cubic root of 172448731 is about 556.6129858874.

The spelling of 172448731 in words is "one hundred seventy-two million, four hundred forty-eight thousand, seven hundred thirty-one".