225195971957 has 4 divisors (see below), whose sum is σ = 245668333056. Its totient is φ = 204723610860.

The previous prime is 225195971933. The next prime is 225195971981. The reversal of 225195971957 is 759179591522.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (225195971933) and next prime (225195971981).

It is a cyclic number.

It is not a de Polignac number, because 225195971957 - 2²² = 225191777653 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 225195971957.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225195971057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10236180533 + ... + 10236180554.

It is an arithmetic number, because the mean of its divisors is an integer number (61417083264).

Almost surely, 2^225195971957 is an apocalyptic number.

It is an amenable number.

225195971957 is a deficient number, since it is larger than the sum of its proper divisors (20472361099).

225195971957 is a wasteful number, since it uses less digits than its factorization.

225195971957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20472361098.

The product of its digits is 17860500, while the sum is 62.

The spelling of 225195971957 in words is "two hundred twenty-five billion, one hundred ninety-five million, nine hundred seventy-one thousand, nine hundred fifty-seven".