22215587 has 2 divisors, whose sum is σ = 22215588. Its totient is φ = 22215586.

The previous prime is 22215581. The next prime is 22215607. The reversal of 22215587 is 78551222.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22215587 - 2²⁰ = 21167011 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22215581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11107793 + 11107794.

It is an arithmetic number, because the mean of its divisors is an integer number (11107794).

Almost surely, 2^22215587 is an apocalyptic number.

22215587 is a deficient number, since it is larger than the sum of its proper divisors (1).

22215587 is an equidigital number, since it uses as much as digits as its factorization.

22215587 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11200, while the sum is 32.

The square root of 22215587 is about 4713.3413837744. The cubic root of 22215587 is about 281.1162371660.

The spelling of 22215587 in words is "twenty-two million, two hundred fifteen thousand, five hundred eighty-seven".