31223045140 has 48 divisors (see below), whose sum is σ = 75066735744. Its totient is φ = 10686268800.

The previous prime is 31223045107. The next prime is 31223045177. The reversal of 31223045140 is 4154032213.

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, 115351 + ... + 275230.

It is an arithmetic number, because the mean of its divisors is an integer number (1563890328).

Almost surely, 2^31223045140 is an apocalyptic number.

It is an amenable number.

31223045140 is an abundant number, since it is smaller than the sum of its proper divisors (43843690604).

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

31223045140 is a wasteful number, since it uses less digits than its factorization.

31223045140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391168 (or 391166 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 31223045140 its reverse (4154032213), we get a palindrome (35377077353).

The spelling of 31223045140 in words is "thirty-one billion, two hundred twenty-three million, forty-five thousand, one hundred forty".