222158993 has 12 divisors (see below), whose sum is σ = 259427520. Its totient is φ = 189686952.

The previous prime is 222158971. The next prime is 222158999. The reversal of 222158993 is 399851222.

222158993 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-222158993 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 222158993.

It is not an unprimeable number, because it can be changed into a prime (222158999) 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, 4268 + ... + 21506.

It is an arithmetic number, because the mean of its divisors is an integer number (21618960).

Almost surely, 2^222158993 is an apocalyptic number.

It is an amenable number.

222158993 is a deficient number, since it is larger than the sum of its proper divisors (37268527).

222158993 is a wasteful number, since it uses less digits than its factorization.

222158993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17516 (or 17509 counting only the distinct ones).

The product of its digits is 77760, while the sum is 41.

The square root of 222158993 is about 14904.9989265347. The cubic root of 222158993 is about 605.6494112671.

The spelling of 222158993 in words is "two hundred twenty-two million, one hundred fifty-eight thousand, nine hundred ninety-three".