22297087 has 2 divisors, whose sum is σ = 22297088. Its totient is φ = 22297086.

The previous prime is 22297061. The next prime is 22297109. The reversal of 22297087 is 78079222.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22297087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22297057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11148543 + 11148544.

It is an arithmetic number, because the mean of its divisors is an integer number (11148544).

Almost surely, 2^22297087 is an apocalyptic number.

22297087 is a deficient number, since it is larger than the sum of its proper divisors (1).

22297087 is an equidigital number, since it uses as much as digits as its factorization.

22297087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 22297087 is about 4721.9791401488. The cubic root of 22297087 is about 281.4595848834.

It can be divided in two parts, 2229 and 7087, that added together give a triangular number (9316 = T₁₃₆).

The spelling of 22297087 in words is "twenty-two million, two hundred ninety-seven thousand, eighty-seven".