31222104225 has 24 divisors (see below), whose sum is σ = 55591358592. Its totient is φ = 15370881600.

The previous prime is 31222104157. The next prime is 31222104253. The reversal of 31222104225 is 52240122213.

It is not a de Polignac number, because 31222104225 - 2¹⁰ = 31222103201 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 31222104195 and 31222104204.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16010361 + ... + 16012310.

It is an arithmetic number, because the mean of its divisors is an integer number (2316306608).

Almost surely, 2^31222104225 is an apocalyptic number.

It is an amenable number.

31222104225 is a deficient number, since it is larger than the sum of its proper divisors (24369254367).

31222104225 is a wasteful number, since it uses less digits than its factorization.

31222104225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32022697 (or 32022692 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

Adding to 31222104225 its reverse (52240122213), we get a palindrome (83462226438).

The spelling of 31222104225 in words is "thirty-one billion, two hundred twenty-two million, one hundred four thousand, two hundred twenty-five".