31020421344 has 48 divisors (see below), whose sum is σ = 88831209600. Its totient is φ = 9400127360.

The previous prime is 31020421337. The next prime is 31020421351. The reversal of 31020421344 is 44312402013.

It is an interprime number because it is at equal distance from previous prime (31020421337) and next prime (31020421351).

It is a tau number, because it is divible by the number of its divisors (48).

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 7 ways as a sum of consecutive naturals, for example, 14686644 + ... + 14688755.

It is an arithmetic number, because the mean of its divisors is an integer number (1850650200).

Almost surely, 2^31020421344 is an apocalyptic number.

It is an amenable number.

31020421344 is an abundant number, since it is smaller than the sum of its proper divisors (57810788256).

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

31020421344 is a wasteful number, since it uses less digits than its factorization.

31020421344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29375423 (or 29375415 counting only the distinct ones).

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

Adding to 31020421344 its reverse (44312402013), we get a palindrome (75332823357).

The spelling of 31020421344 in words is "thirty-one billion, twenty million, four hundred twenty-one thousand, three hundred forty-four".