31244144 has 20 divisors (see below), whose sum is σ = 61944696. Its totient is φ = 15258432.

The previous prime is 31244141. The next prime is 31244153. The reversal of 31244144 is 44144213.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31244141) 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, 22019 + ... + 23394.

Almost surely, 2^31244144 is an apocalyptic number.

It is an amenable number.

31244144 is a deficient number, since it is larger than the sum of its proper divisors (30700552).

31244144 is a wasteful number, since it uses less digits than its factorization.

31244144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45464 (or 45458 counting only the distinct ones).

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

The square root of 31244144 is about 5589.6461426462. The cubic root of 31244144 is about 314.9605863175.

Adding to 31244144 its reverse (44144213), we get a palindrome (75388357).

The spelling of 31244144 in words is "thirty-one million, two hundred forty-four thousand, one hundred forty-four".