31442001213 has 16 divisors (see below), whose sum is σ = 49994735616. Its totient is φ = 17185689840.

The previous prime is 31442001209. The next prime is 31442001221. The reversal of 31442001213 is 31210024413.

It is not a de Polignac number, because 31442001213 - 2² = 31442001209 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 31442001213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31442001263) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32548173 + ... + 32549138.

It is an arithmetic number, because the mean of its divisors is an integer number (3124670976).

Almost surely, 2^31442001213 is an apocalyptic number.

It is an amenable number.

31442001213 is a deficient number, since it is larger than the sum of its proper divisors (18552734403).

31442001213 is a wasteful number, since it uses less digits than its factorization.

31442001213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65097344.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 31442001213 its reverse (31210024413), we get a palindrome (62652025626).

It can be divided in two parts, 3144200 and 1213, that added together give a palindrome (3145413).

The spelling of 31442001213 in words is "thirty-one billion, four hundred forty-two million, one thousand, two hundred thirteen".