31144430040 has 64 divisors (see below), whose sum is σ = 93472911360. Its totient is φ = 8301659520.

The previous prime is 31144430017. The next prime is 31144430063. The reversal of 31144430040 is 4003444113.

It is an interprime number because it is at equal distance from previous prime (31144430017) and next prime (31144430063).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 235497 + ... + 343143.

It is an arithmetic number, because the mean of its divisors is an integer number (1460514240).

Almost surely, 2^31144430040 is an apocalyptic number.

31144430040 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31144430040 is an abundant number, since it is smaller than the sum of its proper divisors (62328481320).

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

31144430040 is a wasteful number, since it uses less digits than its factorization.

31144430040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110072 (or 110068 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 31144430040 its reverse (4003444113), we get a palindrome (35147874153).

The spelling of 31144430040 in words is "thirty-one billion, one hundred forty-four million, four hundred thirty thousand, forty".