222749857 has 8 divisors (see below), whose sum is σ = 246984192. Its totient is φ = 199179600.

The previous prime is 222749809. The next prime is 222749869. The reversal of 222749857 is 758947222.

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 222749857 - 2¹¹ = 222747809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222749897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 165313 + ... + 166654.

It is an arithmetic number, because the mean of its divisors is an integer number (30873024).

Almost surely, 2^222749857 is an apocalyptic number.

It is an amenable number.

222749857 is a deficient number, since it is larger than the sum of its proper divisors (24234335).

222749857 is a wasteful number, since it uses less digits than its factorization.

222749857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332039.

The product of its digits is 564480, while the sum is 46.

The square root of 222749857 is about 14924.8067659183. The cubic root of 222749857 is about 606.1858733745.

It can be divided in two parts, 22274 and 9857, that added together give a triangular number (32131 = T₂₅₃).

The spelling of 222749857 in words is "two hundred twenty-two million, seven hundred forty-nine thousand, eight hundred fifty-seven".