222661643 has 8 divisors (see below), whose sum is σ = 232663200. Its totient is φ = 212686848.

The previous prime is 222661633. The next prime is 222661661. The reversal of 222661643 is 346166222.

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

It is a cyclic number.

It is not a de Polignac number, because 222661643 - 2¹⁰ = 222660619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222661613) 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, 11393 + ... + 23981.

It is an arithmetic number, because the mean of its divisors is an integer number (29082900).

Almost surely, 2^222661643 is an apocalyptic number.

222661643 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

222661643 is a deficient number, since it is larger than the sum of its proper divisors (10001557).

222661643 is a wasteful number, since it uses less digits than its factorization.

222661643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13381.

The product of its digits is 20736, while the sum is 32.

The square root of 222661643 is about 14921.8511921276. The cubic root of 222661643 is about 606.1058416865.

The spelling of 222661643 in words is "two hundred twenty-two million, six hundred sixty-one thousand, six hundred forty-three".