172000031 has 8 divisors (see below), whose sum is σ = 196654080. Its totient is φ = 147366648.

The previous prime is 172000021. The next prime is 172000057. The reversal of 172000031 is 130000271.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 172000031 - 2⁶ = 171999967 is a prime.

It is a super-2 number, since 2×172000031² = 59168021328001922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172000001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22730 + ... + 29336.

It is an arithmetic number, because the mean of its divisors is an integer number (24581760).

Almost surely, 2^172000031 is an apocalyptic number.

172000031 is a deficient number, since it is larger than the sum of its proper divisors (24654049).

172000031 is an equidigital number, since it uses as much as digits as its factorization.

172000031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10333.

The product of its (nonzero) digits is 42, while the sum is 14.

The square root of 172000031 is about 13114.8782304679. The cubic root of 172000031 is about 556.1298100630.

The spelling of 172000031 in words is "one hundred seventy-two million, thirty-one", and thus it is an aban number.