222638977 has 8 divisors (see below), whose sum is σ = 246206880. Its totient is φ = 199625760.

The previous prime is 222638957. The next prime is 222639013. The reversal of 222638977 is 779836222.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222638977 is a prime.

It is a super-2 number, since 2×222638977² = 99136228159213058, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222638917) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137827 + ... + 139432.

It is an arithmetic number, because the mean of its divisors is an integer number (30775860).

Almost surely, 2^222638977 is an apocalyptic number.

It is an amenable number.

222638977 is a deficient number, since it is larger than the sum of its proper divisors (23567903).

222638977 is a wasteful number, since it uses less digits than its factorization.

222638977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277343.

The product of its digits is 508032, while the sum is 46.

The square root of 222638977 is about 14921.0916825814. The cubic root of 222638977 is about 606.0852746638.

The spelling of 222638977 in words is "two hundred twenty-two million, six hundred thirty-eight thousand, nine hundred seventy-seven".