222878249 has 6 divisors (see below), whose sum is σ = 244982010. Its totient is φ = 202616480.

The previous prime is 222878239. The next prime is 222878261. The reversal of 222878249 is 942878222.

It can be written as a sum of positive squares in only one way, i.e., 147744025 + 75134224 = 12155^2 + 8668^2 .

It is a de Polignac number, because none of the positive numbers 2^k-222878249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222878219) 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 5 ways as a sum of consecutive naturals, for example, 920864 + ... + 921105.

It is an arithmetic number, because the mean of its divisors is an integer number (40830335).

Almost surely, 2^222878249 is an apocalyptic number.

It is an amenable number.

222878249 is a deficient number, since it is larger than the sum of its proper divisors (22103761).

222878249 is a wasteful number, since it uses less digits than its factorization.

222878249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1841991 (or 1841980 counting only the distinct ones).

The product of its digits is 258048, while the sum is 44.

The square root of 222878249 is about 14929.1074415050. The cubic root of 222878249 is about 606.3023185939.

The spelling of 222878249 in words is "two hundred twenty-two million, eight hundred seventy-eight thousand, two hundred forty-nine".