22235987 has 2 divisors, whose sum is σ = 22235988. Its totient is φ = 22235986.

The previous prime is 22235977. The next prime is 22236013. The reversal of 22235987 is 78953222.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22235987 - 2¹⁶ = 22170451 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22235987.

It is not a weakly prime, because it can be changed into another prime (22235977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11117993 + 11117994.

It is an arithmetic number, because the mean of its divisors is an integer number (11117994).

Almost surely, 2^22235987 is an apocalyptic number.

22235987 is a deficient number, since it is larger than the sum of its proper divisors (1).

22235987 is an equidigital number, since it uses as much as digits as its factorization.

22235987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60480, while the sum is 38.

The square root of 22235987 is about 4715.5049570539. The cubic root of 22235987 is about 281.2022581021.

The spelling of 22235987 in words is "twenty-two million, two hundred thirty-five thousand, nine hundred eighty-seven".