223161426225 has 36 divisors (see below), whose sum is σ = 400108221916. Its totient is φ = 118899930240.

The previous prime is 223161426221. The next prime is 223161426227. The reversal of 223161426225 is 522624161322.

223161426225 is a `hidden beast` number, since 2 + 2 + 3 + 1 + 6 + 1 + 426 + 225 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 901981089 + 222259445136 = 30033^2 + 471444^2 .

It is not a de Polignac number, because 223161426225 - 2² = 223161426221 is a prime.

It is a super-3 number, since 3×223161426225³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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 223161426225.

It is not an unprimeable number, because it can be changed into a prime (223161426221) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 273082 + ... + 721731.

Almost surely, 2^223161426225 is an apocalyptic number.

223161426225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

223161426225 is a deficient number, since it is larger than the sum of its proper divisors (176946795691).

223161426225 is a wasteful number, since it uses less digits than its factorization.

223161426225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 995826 (or 995818 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

Adding to 223161426225 its reverse (522624161322), we get a palindrome (745785587547).

The spelling of 223161426225 in words is "two hundred twenty-three billion, one hundred sixty-one million, four hundred twenty-six thousand, two hundred twenty-five".