22555487 has 2 divisors, whose sum is σ = 22555488. Its totient is φ = 22555486.

The previous prime is 22555457. The next prime is 22555529. The reversal of 22555487 is 78455522.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22555487 - 2⁸ = 22555231 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22555487.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22555457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11277743 + 11277744.

It is an arithmetic number, because the mean of its divisors is an integer number (11277744).

Almost surely, 2^22555487 is an apocalyptic number.

22555487 is a deficient number, since it is larger than the sum of its proper divisors (1).

22555487 is an equidigital number, since it uses as much as digits as its factorization.

22555487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 112000, while the sum is 38.

The square root of 22555487 is about 4749.2617321011. The cubic root of 22555487 is about 282.5426860081.

The spelling of 22555487 in words is "twenty-two million, five hundred fifty-five thousand, four hundred eighty-seven".