31225425144 has 64 divisors (see below), whose sum is σ = 79013975040. Its totient is φ = 10282471680.

The previous prime is 31225425131. The next prime is 31225425169. The reversal of 31225425144 is 44152452213.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 678844 + ... + 723380.

It is an arithmetic number, because the mean of its divisors is an integer number (1234593360).

Almost surely, 2^31225425144 is an apocalyptic number.

It is an amenable number.

31225425144 is an abundant number, since it is smaller than the sum of its proper divisors (47788549896).

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

31225425144 is a wasteful number, since it uses less digits than its factorization.

31225425144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44900 (or 44896 counting only the distinct ones).

The product of its digits is 38400, while the sum is 33.

Adding to 31225425144 its reverse (44152452213), we get a palindrome (75377877357).

The spelling of 31225425144 in words is "thirty-one billion, two hundred twenty-five million, four hundred twenty-five thousand, one hundred forty-four".