222636861 has 12 divisors (see below), whose sum is σ = 323113440. Its totient is φ = 147719880.

The previous prime is 222636839. The next prime is 222636863. The reversal of 222636861 is 168636222.

It is not a de Polignac number, because 222636861 - 2⁶ = 222636797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222636863) 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, 56721 + ... + 60518.

It is an arithmetic number, because the mean of its divisors is an integer number (26926120).

Almost surely, 2^222636861 is an apocalyptic number.

It is an amenable number.

222636861 is a deficient number, since it is larger than the sum of its proper divisors (100476579).

222636861 is a wasteful number, since it uses less digits than its factorization.

222636861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117456 (or 117453 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 222636861 is about 14921.0207760729. The cubic root of 222636861 is about 606.0833545440.

The spelling of 222636861 in words is "two hundred twenty-two million, six hundred thirty-six thousand, eight hundred sixty-one".