31144251225 has 48 divisors (see below), whose sum is σ = 51848268800. Its totient is φ = 16495617600.

The previous prime is 31144251211. The next prime is 31144251233. The reversal of 31144251225 is 52215244113.

It is not a de Polignac number, because 31144251225 - 2⁹ = 31144250713 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31144251192 and 31144251201.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9416022 + ... + 9419328.

Almost surely, 2^31144251225 is an apocalyptic number.

It is an amenable number.

31144251225 is a deficient number, since it is larger than the sum of its proper divisors (20704017575).

31144251225 is a wasteful number, since it uses less digits than its factorization.

31144251225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4150 (or 4145 counting only the distinct ones).

The product of its digits is 9600, while the sum is 30.

Adding to 31144251225 its reverse (52215244113), we get a palindrome (83359495338).

The spelling of 31144251225 in words is "thirty-one billion, one hundred forty-four million, two hundred fifty-one thousand, two hundred twenty-five".