3131172 has 36 divisors (see below), whose sum is σ = 8635536. Its totient is φ = 948720.

The previous prime is 3131153. The next prime is 3131173. The reversal of 3131172 is 2711313.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (3131173) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3558 + ... + 4349.

It is an arithmetic number, because the mean of its divisors is an integer number (239876).

Almost surely, 2^3131172 is an apocalyptic number.

It is an amenable number.

3131172 is an abundant number, since it is smaller than the sum of its proper divisors (5504364).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3131172 is a wasteful number, since it uses less digits than its factorization.

3131172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7928 (or 7923 counting only the distinct ones).

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

The square root of 3131172 is about 1769.5117970785. The cubic root of 3131172 is about 146.2970744802.

Adding to 3131172 its reverse (2711313), we get a palindrome (5842485).

It can be divided in two parts, 313 and 1172, that added together give a triangular number (1485 = T₅₄).

The spelling of 3131172 in words is "three million, one hundred thirty-one thousand, one hundred seventy-two".