222081591 has 16 divisors (see below), whose sum is σ = 314924544. Its totient is φ = 138724224.

The previous prime is 222081581. The next prime is 222081619. The reversal of 222081591 is 195180222.

It is not a de Polignac number, because 222081591 - 2¹⁰ = 222080567 is a prime.

It is a super-2 number, since 2×222081591² = 98640466122182562, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222081581) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1986 + ... + 21168.

It is an arithmetic number, because the mean of its divisors is an integer number (19682784).

Almost surely, 2^222081591 is an apocalyptic number.

222081591 is a deficient number, since it is larger than the sum of its proper divisors (92842953).

222081591 is a wasteful number, since it uses less digits than its factorization.

222081591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19430.

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 222081591 is about 14902.4021889090. The cubic root of 222081591 is about 605.5790653699.

The spelling of 222081591 in words is "two hundred twenty-two million, eighty-one thousand, five hundred ninety-one".