31143044 has 12 divisors (see below), whose sum is σ = 55001100. Its totient is φ = 15428448.

The previous prime is 31143029. The next prime is 31143053. The reversal of 31143044 is 44034113.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 8940100 + 22202944 = 2990^2 + 4712^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35279 + ... + 36150.

It is an arithmetic number, because the mean of its divisors is an integer number (4583425).

Almost surely, 2^31143044 is an apocalyptic number.

It is an amenable number.

31143044 is a deficient number, since it is larger than the sum of its proper divisors (23858056).

31143044 is a wasteful number, since it uses less digits than its factorization.

31143044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71542 (or 71540 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 31143044 is about 5580.5953087462. The cubic root of 31143044 is about 314.6205020812.

Adding to 31143044 its reverse (44034113), we get a palindrome (75177157).

The spelling of 31143044 in words is "thirty-one million, one hundred forty-three thousand, forty-four".