22131647987 has 2 divisors, whose sum is σ = 22131647988. Its totient is φ = 22131647986.

The previous prime is 22131647977. The next prime is 22131648017. The reversal of 22131647987 is 78974613122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22131647987 - 2⁸ = 22131647731 is a prime.

It is a super-3 number, since 3×22131647987³ (a number of 32 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (22131647977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11065823993 + 11065823994.

It is an arithmetic number, because the mean of its divisors is an integer number (11065823994).

Almost surely, 2^22131647987 is an apocalyptic number.

22131647987 is a deficient number, since it is larger than the sum of its proper divisors (1).

22131647987 is an equidigital number, since it uses as much as digits as its factorization.

22131647987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1016064, while the sum is 50.

The spelling of 22131647987 in words is "twenty-two billion, one hundred thirty-one million, six hundred forty-seven thousand, nine hundred eighty-seven".