223892561 has 6 divisors (see below), whose sum is σ = 236296962. Its totient is φ = 212108400.

The previous prime is 223892549. The next prime is 223892569. The reversal of 223892561 is 165298322.

It can be written as a sum of positive squares in only one way, i.e., 205779025 + 18113536 = 14345^2 + 4256^2 .

It is not a de Polignac number, because 223892561 - 2⁶ = 223892497 is a prime.

It is a super-2 number, since 2×223892561² = 100255757742277442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (223892569) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 309740 + ... + 310461.

It is an arithmetic number, because the mean of its divisors is an integer number (39382827).

Almost surely, 2^223892561 is an apocalyptic number.

It is an amenable number.

223892561 is a deficient number, since it is larger than the sum of its proper divisors (12404401).

223892561 is an equidigital number, since it uses as much as digits as its factorization.

223892561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 620239 (or 620220 counting only the distinct ones).

The product of its digits is 51840, while the sum is 38.

The square root of 223892561 is about 14963.0398315316. The cubic root of 223892561 is about 607.2206812035.

The spelling of 223892561 in words is "two hundred twenty-three million, eight hundred ninety-two thousand, five hundred sixty-one".