320222887 has 2 divisors, whose sum is σ = 320222888. Its totient is φ = 320222886.

The previous prime is 320222857. The next prime is 320222921. The reversal of 320222887 is 788222023.

It is an a-pointer prime, because the next prime (320222921) can be obtained adding 320222887 to its sum of digits (34).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320222887 is a prime.

It is a super-2 number, since 2×320222887² = 205085394717229538, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320222857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160111443 + 160111444.

It is an arithmetic number, because the mean of its divisors is an integer number (160111444).

Almost surely, 2^320222887 is an apocalyptic number.

320222887 is a deficient number, since it is larger than the sum of its proper divisors (1).

320222887 is an equidigital number, since it uses as much as digits as its factorization.

320222887 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21504, while the sum is 34.

The square root of 320222887 is about 17894.7726166051. The cubic root of 320222887 is about 684.1491465683.

The spelling of 320222887 in words is "three hundred twenty million, two hundred twenty-two thousand, eight hundred eighty-seven".