222678857 has 2 divisors, whose sum is σ = 222678858. Its totient is φ = 222678856.

The previous prime is 222678793. The next prime is 222678887. The reversal of 222678857 is 758876222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 179854921 + 42823936 = 13411^2 + 6544^2 .

It is a cyclic number.

It is not a de Polignac number, because 222678857 - 2⁶ = 222678793 is a prime.

It is a pancake number, because a pancake can be divided into 222678857 parts by 21103 straight cuts.

It is not a weakly prime, because it can be changed into another prime (222678887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111339428 + 111339429.

It is an arithmetic number, because the mean of its divisors is an integer number (111339429).

Almost surely, 2^222678857 is an apocalyptic number.

It is an amenable number.

222678857 is a deficient number, since it is larger than the sum of its proper divisors (1).

222678857 is an equidigital number, since it uses as much as digits as its factorization.

222678857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 752640, while the sum is 47.

The square root of 222678857 is about 14922.4279860886. The cubic root of 222678857 is about 606.1214606573.

The spelling of 222678857 in words is "two hundred twenty-two million, six hundred seventy-eight thousand, eight hundred fifty-seven".