31442718399 has 12 divisors (see below), whose sum is σ = 43825643736. Its totient is φ = 20050428112.

The previous prime is 31442718397. The next prime is 31442718403. The reversal of 31442718399 is 99381724413.

It is a happy number.

It is not a de Polignac number, because 31442718399 - 2¹ = 31442718397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31442718397) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9904752 + ... + 9907925.

It is an arithmetic number, because the mean of its divisors is an integer number (3652136978).

Almost surely, 2^31442718399 is an apocalyptic number.

31442718399 is a deficient number, since it is larger than the sum of its proper divisors (12382925337).

31442718399 is a wasteful number, since it uses less digits than its factorization.

31442718399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19812726 (or 19812703 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 51.

The spelling of 31442718399 in words is "thirty-one billion, four hundred forty-two million, seven hundred eighteen thousand, three hundred ninety-nine".