31142444472 has 24 divisors (see below), whose sum is σ = 84344120640. Its totient is φ = 10380814800.

The previous prime is 31142444471. The next prime is 31142444477. The reversal of 31142444472 is 27444424113.

31142444472 is a `hidden beast` number, since 3 + 1 + 142 + 4 + 44 + 472 = 666.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31142444471) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 216266904 + ... + 216267047.

It is an arithmetic number, because the mean of its divisors is an integer number (3514338360).

Almost surely, 2^31142444472 is an apocalyptic number.

It is an amenable number.

31142444472 is an abundant number, since it is smaller than the sum of its proper divisors (53201676168).

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

31142444472 is a wasteful number, since it uses less digits than its factorization.

31142444472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432533963 (or 432533956 counting only the distinct ones).

The product of its digits is 86016, while the sum is 36.

Adding to 31142444472 its reverse (27444424113), we get a palindrome (58586868585).

The spelling of 31142444472 in words is "thirty-one billion, one hundred forty-two million, four hundred forty-four thousand, four hundred seventy-two".