31142423320 has 32 divisors (see below), whose sum is σ = 70118219520. Its totient is φ = 12448477440.

The previous prime is 31142423303. The next prime is 31142423321. The reversal of 31142423320 is 2332424113.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31142423321) 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, 205797 + ... + 323476.

It is an arithmetic number, because the mean of its divisors is an integer number (2191194360).

Almost surely, 2^31142423320 is an apocalyptic number.

It is an amenable number.

31142423320 is an abundant number, since it is smaller than the sum of its proper divisors (38975796200).

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

31142423320 is a wasteful number, since it uses less digits than its factorization.

31142423320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530755 (or 530751 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 31142423320 its reverse (2332424113), we get a palindrome (33474847433).

The spelling of 31142423320 in words is "thirty-one billion, one hundred forty-two million, four hundred twenty-three thousand, three hundred twenty".