222979897 has 16 divisors (see below), whose sum is σ = 261492352. Its totient is φ = 186157440.

The previous prime is 222979879. The next prime is 222979907. The reversal of 222979897 is 798979222.

It is not a de Polignac number, because 222979897 - 2¹¹ = 222977849 is a prime.

It is a super-2 number, since 2×222979897² = 99440068932261218, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222979297) 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, 136747 + ... + 138367.

It is an arithmetic number, because the mean of its divisors is an integer number (16343272).

Almost surely, 2^222979897 is an apocalyptic number.

It is an amenable number.

222979897 is a deficient number, since it is larger than the sum of its proper divisors (38512455).

222979897 is a wasteful number, since it uses less digits than its factorization.

222979897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2128.

The product of its digits is 2286144, while the sum is 55.

The square root of 222979897 is about 14932.5114096725. The cubic root of 222979897 is about 606.3944766094.

The spelling of 222979897 in words is "two hundred twenty-two million, nine hundred seventy-nine thousand, eight hundred ninety-seven".