31013043144 has 32 divisors (see below), whose sum is σ = 77871192000. Its totient is φ = 10292536512.

The previous prime is 31013043143. The next prime is 31013043179. The reversal of 31013043144 is 44134031013.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (31013043143) 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, 2815924 + ... + 2826915.

It is an arithmetic number, because the mean of its divisors is an integer number (2433474750).

Almost surely, 2^31013043144 is an apocalyptic number.

It is an amenable number.

31013043144 is an abundant number, since it is smaller than the sum of its proper divisors (46858148856).

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

31013043144 is a wasteful number, since it uses less digits than its factorization.

31013043144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5643077 (or 5643073 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 31013043144 its reverse (44134031013), we get a palindrome (75147074157).

The spelling of 31013043144 in words is "thirty-one billion, thirteen million, forty-three thousand, one hundred forty-four".