225257192555 has 4 divisors (see below), whose sum is σ = 270308631072. Its totient is φ = 180205754040.

The previous prime is 225257192551. The next prime is 225257192561. The reversal of 225257192555 is 555291752522.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 225257192555 - 2² = 225257192551 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225257192551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22525719251 + ... + 22525719260.

It is an arithmetic number, because the mean of its divisors is an integer number (67577157768).

Almost surely, 2^225257192555 is an apocalyptic number.

225257192555 is a deficient number, since it is larger than the sum of its proper divisors (45051438517).

225257192555 is an equidigital number, since it uses as much as digits as its factorization.

225257192555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45051438516.

The product of its digits is 3150000, while the sum is 50.

The spelling of 225257192555 in words is "two hundred twenty-five billion, two hundred fifty-seven million, one hundred ninety-two thousand, five hundred fifty-five".