31444002140 has 12 divisors (see below), whose sum is σ = 66032404536. Its totient is φ = 12577600848.

The previous prime is 31444002131. The next prime is 31444002169. The reversal of 31444002140 is 4120044413.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 786100034 + ... + 786100073.

It is an arithmetic number, because the mean of its divisors is an integer number (5502700378).

Almost surely, 2^31444002140 is an apocalyptic number.

It is an amenable number.

31444002140 is an abundant number, since it is smaller than the sum of its proper divisors (34588402396).

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

31444002140 is a wasteful number, since it uses less digits than its factorization.

31444002140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1572200116 (or 1572200114 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 31444002140 its reverse (4120044413), we get a palindrome (35564046553).

The spelling of 31444002140 in words is "thirty-one billion, four hundred forty-four million, two thousand, one hundred forty".