31144134 has 32 divisors (see below), whose sum is σ = 71850240. Its totient is φ = 8815392.

The previous prime is 31144111. The next prime is 31144147. The reversal of 31144134 is 43144113.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 31144134.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1177 + ... + 7979.

It is an arithmetic number, because the mean of its divisors is an integer number (2245320).

Almost surely, 2^31144134 is an apocalyptic number.

31144134 is an abundant number, since it is smaller than the sum of its proper divisors (40706106).

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

31144134 is a wasteful number, since it uses less digits than its factorization.

31144134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6924.

The product of its digits is 576, while the sum is 21.

The square root of 31144134 is about 5580.6929677236. The cubic root of 31144134 is about 314.6241725888.

Subtracting from 31144134 its sum of digits (21), we obtain a palindrome (31144113).

Adding to 31144134 its reverse (43144113), we get a palindrome (74288247).

The spelling of 31144134 in words is "thirty-one million, one hundred forty-four thousand, one hundred thirty-four".