31100142144 has 56 divisors (see below), whose sum is σ = 84036578688. Its totient is φ = 10146142720.

The previous prime is 31100142137. The next prime is 31100142163. The reversal of 31100142144 is 44124100113.

It is a self number, because there is not a number n which added to its sum of digits gives 31100142144.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1714167 + ... + 1732214.

Almost surely, 2^31100142144 is an apocalyptic number.

It is an amenable number.

31100142144 is an abundant number, since it is smaller than the sum of its proper divisors (52936436544).

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

31100142144 is a wasteful number, since it uses less digits than its factorization.

31100142144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3446443 (or 3446433 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 31100142144 its reverse (44124100113), we get a palindrome (75224242257).

The spelling of 31100142144 in words is "thirty-one billion, one hundred million, one hundred forty-two thousand, one hundred forty-four".