222911645 has 18 divisors (see below), whose sum is σ = 294507486. Its totient is φ = 161850480.

The previous prime is 222911639. The next prime is 222911677. The reversal of 222911645 is 546119222.

It can be written as a sum of positive squares in only one way, i.e., 178329316 + 44582329 = 13354^2 + 6677^2 .

It is not a de Polignac number, because 222911645 - 2⁶ = 222911581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 366932 + ... + 367538.

It is an arithmetic number, because the mean of its divisors is an integer number (16361527).

Almost surely, 2^222911645 is an apocalyptic number.

It is an amenable number.

222911645 is a deficient number, since it is larger than the sum of its proper divisors (71595841).

222911645 is an frugal number, since it uses more digits than its factorization.

222911645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1241 (or 623 counting only the distinct ones).

The product of its digits is 8640, while the sum is 32.

The square root of 222911645 is about 14930.2258857661. The cubic root of 222911645 is about 606.3325997917.

The spelling of 222911645 in words is "two hundred twenty-two million, nine hundred eleven thousand, six hundred forty-five".