22548331987 has 2 divisors, whose sum is σ = 22548331988. Its totient is φ = 22548331986.

The previous prime is 22548331969. The next prime is 22548331991. The reversal of 22548331987 is 78913384522.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22548331987 - 2¹⁵ = 22548299219 is a prime.

It is not a weakly prime, because it can be changed into another prime (22548331937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11274165993 + 11274165994.

It is an arithmetic number, because the mean of its divisors is an integer number (11274165994).

Almost surely, 2^22548331987 is an apocalyptic number.

22548331987 is a deficient number, since it is larger than the sum of its proper divisors (1).

22548331987 is an equidigital number, since it uses as much as digits as its factorization.

22548331987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2903040, while the sum is 52.

The spelling of 22548331987 in words is "twenty-two billion, five hundred forty-eight million, three hundred thirty-one thousand, nine hundred eighty-seven".