31020423144 has 16 divisors (see below), whose sum is σ = 77551057920. Its totient is φ = 10340141040.

The previous prime is 31020423143. The next prime is 31020423211. The reversal of 31020423144 is 44132402013.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 1292517631 = 31020423144 / (3 + 1 + 0 + 2 + 0 + 4 + 2 + 3 + 1 + 4 + 4).

It is not an unprimeable number, because it can be changed into a prime (31020423143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 646258792 + ... + 646258839.

It is an arithmetic number, because the mean of its divisors is an integer number (4846941120).

Almost surely, 2^31020423144 is an apocalyptic number.

It is an amenable number.

31020423144 is an abundant number, since it is smaller than the sum of its proper divisors (46530634776).

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

31020423144 is a wasteful number, since it uses less digits than its factorization.

31020423144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1292517640 (or 1292517636 counting only the distinct ones).

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

Adding to 31020423144 its reverse (44132402013), we get a palindrome (75152825157).

The spelling of 31020423144 in words is "thirty-one billion, twenty million, four hundred twenty-three thousand, one hundred forty-four".