22157207 has 2 divisors, whose sum is σ = 22157208. Its totient is φ = 22157206.

The previous prime is 22157167. The next prime is 22157263. The reversal of 22157207 is 70275122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22157207 - 2⁶ = 22157143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22157297) 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, 11078603 + 11078604.

It is an arithmetic number, because the mean of its divisors is an integer number (11078604).

Almost surely, 2^22157207 is an apocalyptic number.

22157207 is a deficient number, since it is larger than the sum of its proper divisors (1).

22157207 is an equidigital number, since it uses as much as digits as its factorization.

22157207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1960, while the sum is 26.

The square root of 22157207 is about 4707.1442510295. The cubic root of 22157207 is about 280.8697741331.

The spelling of 22157207 in words is "twenty-two million, one hundred fifty-seven thousand, two hundred seven".