31144 has 16 divisors (see below), whose sum is σ = 62100. Its totient is φ = 14592.

The previous prime is 31139. The next prime is 31147. The reversal of 31144 is 44113.

It can be written as a sum of positive squares in 2 ways, for example, as 26244 + 4900 = 162^2 + 70^2 .

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (31147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22 + ... + 250.

2³¹¹⁴⁴ is an apocalyptic number.

31144 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is an amenable number.

31144 is a deficient number, since it is larger than the sum of its proper divisors (30956).

31144 is a wasteful number, since it uses less digits than its factorization.

31144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252 (or 248 counting only the distinct ones).

The product of its digits is 48, while the sum is 13.

The square root of 31144 is about 176.4766273476. The cubic root of 31144 is about 31.4623721357.

Adding to 31144 its reverse (44113), we get a palindrome (75257).

The spelling of 31144 in words is "thirty-one thousand, one hundred forty-four".