225720434636 has 12 divisors (see below), whose sum is σ = 395026589328. Its totient is φ = 112855694832.

The previous prime is 225720434629. The next prime is 225720434657. The reversal of 225720434636 is 636434027522.

It is a happy number.

It is a super-2 number, since 2×225720434636² (a number of 24 digits) contains 22 as substring.

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, 1017056 + ... + 1218951.

It is an arithmetic number, because the mean of its divisors is an integer number (32918882444).

Almost surely, 2^225720434636 is an apocalyptic number.

It is an amenable number.

225720434636 is a deficient number, since it is larger than the sum of its proper divisors (169306154692).

225720434636 is a wasteful number, since it uses less digits than its factorization.

225720434636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2261248 (or 2261246 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 44.

The spelling of 225720434636 in words is "two hundred twenty-five billion, seven hundred twenty million, four hundred thirty-four thousand, six hundred thirty-six".