31381044 has 24 divisors (see below), whose sum is σ = 74047680. Its totient is φ = 10342464.

The previous prime is 31381043. The next prime is 31381061. The reversal of 31381044 is 44018313.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31381043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13624 + ... + 15759.

It is an arithmetic number, because the mean of its divisors is an integer number (3085320).

Almost surely, 2^31381044 is an apocalyptic number.

It is an amenable number.

31381044 is an abundant number, since it is smaller than the sum of its proper divisors (42666636).

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

31381044 is a wasteful number, since it uses less digits than its factorization.

31381044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29479 (or 29477 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 31381044 is about 5601.8786134653. The cubic root of 31381044 is about 315.4199287294.

Adding to 31381044 its reverse (44018313), we get a palindrome (75399357).

The spelling of 31381044 in words is "thirty-one million, three hundred eighty-one thousand, forty-four".