22164487 has 2 divisors, whose sum is σ = 22164488. Its totient is φ = 22164486.

The previous prime is 22164463. The next prime is 22164503. The reversal of 22164487 is 78446122.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22164487 is a prime.

It is equal to p_1398931 and since 22164487 and 1398931 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22165487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11082243 + 11082244.

It is an arithmetic number, because the mean of its divisors is an integer number (11082244).

Almost surely, 2^22164487 is an apocalyptic number.

22164487 is a deficient number, since it is larger than the sum of its proper divisors (1).

22164487 is an equidigital number, since it uses as much as digits as its factorization.

22164487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21504, while the sum is 34.

The square root of 22164487 is about 4707.9174801604. The cubic root of 22164487 is about 280.9005317410.

The spelling of 22164487 in words is "twenty-two million, one hundred sixty-four thousand, four hundred eighty-seven".