222581601 has 20 divisors (see below), whose sum is σ = 362727024. Its totient is φ = 134897400.

The previous prime is 222581591. The next prime is 222581621. The reversal of 222581601 is 106185222.

It is a happy number.

222581601 is a `hidden beast` number, since 2 + 2 + 2 + 58 + 1 + 601 = 666.

It is not a de Polignac number, because 222581601 - 2⁶ = 222581537 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (222581621) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 124015 + ... + 125796.

Almost surely, 2^222581601 is an apocalyptic number.

It is an amenable number.

222581601 is a deficient number, since it is larger than the sum of its proper divisors (140145423).

222581601 is a wasteful number, since it uses less digits than its factorization.

222581601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249834 (or 249825 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 222581601 is about 14919.1689111693. The cubic root of 222581601 is about 606.0332057091.

The spelling of 222581601 in words is "two hundred twenty-two million, five hundred eighty-one thousand, six hundred one".