322679251981 has 2 divisors, whose sum is σ = 322679251982. Its totient is φ = 322679251980.

The previous prime is 322679251963. The next prime is 322679251991. The reversal of 322679251981 is 189152976223.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 321138689481 + 1540562500 = 566691^2 + 39250^2 .

It is a cyclic number.

It is not a de Polignac number, because 322679251981 - 2⁵ = 322679251949 is a prime.

It is a super-2 number, since 2×322679251981² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (322679251991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 161339625990 + 161339625991.

It is an arithmetic number, because the mean of its divisors is an integer number (161339625991).

Almost surely, 2^322679251981 is an apocalyptic number.

It is an amenable number.

322679251981 is a deficient number, since it is larger than the sum of its proper divisors (1).

322679251981 is an equidigital number, since it uses as much as digits as its factorization.

322679251981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3265920, while the sum is 55.

The spelling of 322679251981 in words is "three hundred twenty-two billion, six hundred seventy-nine million, two hundred fifty-one thousand, nine hundred eighty-one".