31144244 has 12 divisors (see below), whose sum is σ = 54544644. Its totient is φ = 15560064.

The previous prime is 31144241. The next prime is 31144261. The reversal of 31144244 is 44244113.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 5943844 + 25200400 = 2438^2 + 5020^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31144241) 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, 5414 + ... + 9570.

It is an arithmetic number, because the mean of its divisors is an integer number (4545387).

Almost surely, 2^31144244 is an apocalyptic number.

It is an amenable number.

31144244 is a deficient number, since it is larger than the sum of its proper divisors (23400400).

31144244 is a wasteful number, since it uses less digits than its factorization.

31144244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6034 (or 6032 counting only the distinct ones).

The product of its digits is 1536, while the sum is 23.

The square root of 31144244 is about 5580.7028231218. The cubic root of 31144244 is about 314.6245430023.

Adding to 31144244 its reverse (44244113), we get a palindrome (75388357).

The spelling of 31144244 in words is "thirty-one million, one hundred forty-four thousand, two hundred forty-four".