13172031 has 16 divisors (see below), whose sum is σ = 20363520. Its totient is φ = 8399160.

The previous prime is 13172023. The next prime is 13172051. The reversal of 13172031 is 13027131.

It is not a de Polignac number, because 13172031 - 2³ = 13172023 is a prime.

It is a super-2 number, since 2×13172031² = 347004801329922, which contains 22 as substring.

It is a zygodrome in base 5.

It is a junction number, because it is equal to n+sod(n) for n = 13171995 and 13172013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13172051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9985 + ... + 11226.

It is an arithmetic number, because the mean of its divisors is an integer number (1272720).

Almost surely, 2^13172031 is an apocalyptic number.

13172031 is a deficient number, since it is larger than the sum of its proper divisors (7191489).

13172031 is a wasteful number, since it uses less digits than its factorization.

13172031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21243 (or 21237 counting only the distinct ones).

The product of its (nonzero) digits is 126, while the sum is 18.

The square root of 13172031 is about 3629.3292768775. The cubic root of 13172031 is about 236.1661128222.

Adding to 13172031 its reverse (13027131), we get a palindrome (26199162).

The spelling of 13172031 in words is "thirteen million, one hundred seventy-two thousand, thirty-one".