31442423210 has 32 divisors (see below), whose sum is σ = 63870508800. Its totient is φ = 11039344960.

The previous prime is 31442423191. The next prime is 31442423213. The reversal of 31442423210 is 1232424413.

It is a self number, because there is not a number n which added to its sum of digits gives 31442423210.

It is not an unprimeable number, because it can be changed into a prime (31442423213) 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, 4925090 + ... + 4931469.

It is an arithmetic number, because the mean of its divisors is an integer number (1995953400).

Almost surely, 2^31442423210 is an apocalyptic number.

31442423210 is an abundant number, since it is smaller than the sum of its proper divisors (32428085590).

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

31442423210 is a wasteful number, since it uses less digits than its factorization.

31442423210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9856606.

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 31442423210 its reverse (1232424413), we get a palindrome (32674847623).

The spelling of 31442423210 in words is "thirty-one billion, four hundred forty-two million, four hundred twenty-three thousand, two hundred ten".