22331231987 has 2 divisors, whose sum is σ = 22331231988. Its totient is φ = 22331231986.

The previous prime is 22331231983. The next prime is 22331232061. The reversal of 22331231987 is 78913213322.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22331231987 - 2² = 22331231983 is a prime.

It is not a weakly prime, because it can be changed into another prime (22331231983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11165615993 + 11165615994.

It is an arithmetic number, because the mean of its divisors is an integer number (11165615994).

Almost surely, 2^22331231987 is an apocalyptic number.

22331231987 is a deficient number, since it is larger than the sum of its proper divisors (1).

22331231987 is an equidigital number, since it uses as much as digits as its factorization.

22331231987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 41.

The spelling of 22331231987 in words is "twenty-two billion, three hundred thirty-one million, two hundred thirty-one thousand, nine hundred eighty-seven".