322561139 has 2 divisors, whose sum is σ = 322561140. Its totient is φ = 322561138.

The previous prime is 322561121. The next prime is 322561199. The reversal of 322561139 is 931165223.

It is a weak prime.

It is an emirp because it is prime and its reverse (931165223) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 322561139 - 2¹⁶ = 322495603 is a prime.

It is a Sophie Germain prime.

It is equal to p_17405942 and since 322561139 and 17405942 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (322561199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 161280569 + 161280570.

It is an arithmetic number, because the mean of its divisors is an integer number (161280570).

Almost surely, 2^322561139 is an apocalyptic number.

322561139 is a deficient number, since it is larger than the sum of its proper divisors (1).

322561139 is an equidigital number, since it uses as much as digits as its factorization.

322561139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9720, while the sum is 32.

The square root of 322561139 is about 17959.9871659197. The cubic root of 322561139 is about 685.8103178107.

The spelling of 322561139 in words is "three hundred twenty-two million, five hundred sixty-one thousand, one hundred thirty-nine".