222603561 has 12 divisors (see below), whose sum is σ = 329016688. Its totient is φ = 144950904.

The previous prime is 222603553. The next prime is 222603569. The reversal of 222603561 is 165306222.

222603561 is a `hidden beast` number, since 2 + 2 + 2 + 603 + 56 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (222603553) and next prime (222603569).

It is not a de Polignac number, because 222603561 - 2³ = 222603553 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (222603569) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 287215 + ... + 287988.

Almost surely, 2^222603561 is an apocalyptic number.

It is an amenable number.

222603561 is a deficient number, since it is larger than the sum of its proper divisors (106413127).

222603561 is a wasteful number, since it uses less digits than its factorization.

222603561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 575252 (or 575249 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 222603561 is about 14919.9048589460. The cubic root of 222603561 is about 606.0531355558.

Adding to 222603561 its reverse (165306222), we get a palindrome (387909783).

The spelling of 222603561 in words is "two hundred twenty-two million, six hundred three thousand, five hundred sixty-one".