225721477575 has 288 divisors, whose sum is σ = 493690187520. Its totient is φ = 100183910400.

The previous prime is 225721477567. The next prime is 225721477589. The reversal of 225721477575 is 575774127522.

225721477575 is a `hidden beast` number, since 2 + 2 + 5 + 7 + 21 + 47 + 7 + 575 = 666.

It is not a de Polignac number, because 225721477575 - 2³ = 225721477567 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 79394104 + ... + 79396946.

It is an arithmetic number, because the mean of its divisors is an integer number (1714202040).

Almost surely, 2^225721477575 is an apocalyptic number.

225721477575 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

225721477575 is an abundant number, since it is smaller than the sum of its proper divisors (267968709945).

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

225721477575 is a wasteful number, since it uses less digits than its factorization.

225721477575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2944 (or 2916 counting only the distinct ones).

The product of its digits is 9604000, while the sum is 54.

The spelling of 225721477575 in words is "two hundred twenty-five billion, seven hundred twenty-one million, four hundred seventy-seven thousand, five hundred seventy-five".