31223030240 has 48 divisors (see below), whose sum is σ = 73777368672. Its totient is φ = 12487017984.

The previous prime is 31223030233. The next prime is 31223030257. The reversal of 31223030240 is 4203032213.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1139582 + ... + 1166658.

It is an arithmetic number, because the mean of its divisors is an integer number (1537028514).

Almost surely, 2^31223030240 is an apocalyptic number.

It is an amenable number.

31223030240 is an abundant number, since it is smaller than the sum of its proper divisors (42554338432).

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

31223030240 is a wasteful number, since it uses less digits than its factorization.

31223030240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34299 (or 34291 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

Adding to 31223030240 its reverse (4203032213), we get a palindrome (35426062453).

The spelling of 31223030240 in words is "thirty-one billion, two hundred twenty-three million, thirty thousand, two hundred forty".