222894731 has 2 divisors, whose sum is σ = 222894732. Its totient is φ = 222894730.

The previous prime is 222894713. The next prime is 222894751. The reversal of 222894731 is 137498222.

Together with previous prime (222894713) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222894731 is a prime.

It is a super-2 number, since 2×222894731² = 99364122215124722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (222894751) 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 as a sum of consecutive naturals, namely, 111447365 + 111447366.

It is an arithmetic number, because the mean of its divisors is an integer number (111447366).

Almost surely, 2^222894731 is an apocalyptic number.

222894731 is a deficient number, since it is larger than the sum of its proper divisors (1).

222894731 is an equidigital number, since it uses as much as digits as its factorization.

222894731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 38.

The square root of 222894731 is about 14929.6594401882. The cubic root of 222894731 is about 606.3172637169.

The spelling of 222894731 in words is "two hundred twenty-two million, eight hundred ninety-four thousand, seven hundred thirty-one".