22313987 has 2 divisors, whose sum is σ = 22313988. Its totient is φ = 22313986.

The previous prime is 22313981. The next prime is 22314011. The reversal of 22313987 is 78931322.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22313987 - 2⁴ = 22313971 is a prime.

It is a super-3 number, since 3×22313987³ (a number of 23 digits) contains 333 as substring.

It is a Chen prime.

It is a zygodrome in base 3.

It is not a weakly prime, because it can be changed into another prime (22313981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11156993 + 11156994.

It is an arithmetic number, because the mean of its divisors is an integer number (11156994).

Almost surely, 2^22313987 is an apocalyptic number.

22313987 is a deficient number, since it is larger than the sum of its proper divisors (1).

22313987 is an equidigital number, since it uses as much as digits as its factorization.

22313987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18144, while the sum is 35.

The square root of 22313987 is about 4723.7683050717. The cubic root of 22313987 is about 281.5306773647.

The spelling of 22313987 in words is "twenty-two million, three hundred thirteen thousand, nine hundred eighty-seven".