225979798261 has 4 divisors (see below), whose sum is σ = 258262626592. Its totient is φ = 193696969932.

The previous prime is 225979798259. The next prime is 225979798279. The reversal of 225979798261 is 162897979522.

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 a cyclic number.

It is not a de Polignac number, because 225979798261 - 2¹ = 225979798259 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225979790261) 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, 16141414155 + ... + 16141414168.

It is an arithmetic number, because the mean of its divisors is an integer number (64565656648).

Almost surely, 2^225979798261 is an apocalyptic number.

It is an amenable number.

225979798261 is a deficient number, since it is larger than the sum of its proper divisors (32282828331).

225979798261 is an equidigital number, since it uses as much as digits as its factorization.

225979798261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32282828330.

The product of its digits is 68584320, while the sum is 67.

The spelling of 225979798261 in words is "two hundred twenty-five billion, nine hundred seventy-nine million, seven hundred ninety-eight thousand, two hundred sixty-one".