22158247 has 2 divisors, whose sum is σ = 22158248. Its totient is φ = 22158246.

The previous prime is 22158239. The next prime is 22158271. The reversal of 22158247 is 74285122.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22158247 - 2³ = 22158239 is a prime.

It is a super-2 number, since 2×22158247² = 981975820226018, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22158277) 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, 11079123 + 11079124.

It is an arithmetic number, because the mean of its divisors is an integer number (11079124).

Almost surely, 2^22158247 is an apocalyptic number.

22158247 is a deficient number, since it is larger than the sum of its proper divisors (1).

22158247 is an equidigital number, since it uses as much as digits as its factorization.

22158247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8960, while the sum is 31.

The square root of 22158247 is about 4707.2547201102. The cubic root of 22158247 is about 280.8741684895.

The spelling of 22158247 in words is "twenty-two million, one hundred fifty-eight thousand, two hundred forty-seven".