225479657891 has 8 divisors (see below), whose sum is σ = 231313458768. Its totient is φ = 219661776000.

The previous prime is 225479657869. The next prime is 225479657927. The reversal of 225479657891 is 198756974522.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 225479657891 - 2¹⁰ = 225479656867 is a prime.

It is a super-2 number, since 2×225479657891² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225479657801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3951050 + ... + 4007711.

It is an arithmetic number, because the mean of its divisors is an integer number (28914182346).

Almost surely, 2^225479657891 is an apocalyptic number.

225479657891 is a deficient number, since it is larger than the sum of its proper divisors (5833800877).

225479657891 is an equidigital number, since it uses as much as digits as its factorization.

225479657891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7959493.

The product of its digits is 76204800, while the sum is 65.

The spelling of 225479657891 in words is "two hundred twenty-five billion, four hundred seventy-nine million, six hundred fifty-seven thousand, eight hundred ninety-one".