222499987 has 2 divisors, whose sum is σ = 222499988. Its totient is φ = 222499986.

The previous prime is 222499969. The next prime is 222500023. The reversal of 222499987 is 789994222.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222499987 is a prime.

It is not a weakly prime, because it can be changed into another prime (222499967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111249993 + 111249994.

It is an arithmetic number, because the mean of its divisors is an integer number (111249994).

Almost surely, 2^222499987 is an apocalyptic number.

222499987 is a deficient number, since it is larger than the sum of its proper divisors (1).

222499987 is an equidigital number, since it uses as much as digits as its factorization.

222499987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1306368, while the sum is 52.

The square root of 222499987 is about 14916.4334544153. The cubic root of 222499987 is about 605.9591252516.

The spelling of 222499987 in words is "two hundred twenty-two million, four hundred ninety-nine thousand, nine hundred eighty-seven".