320033350981 has 2 divisors, whose sum is σ = 320033350982. Its totient is φ = 320033350980.

The previous prime is 320033350969. The next prime is 320033351023. The reversal of 320033350981 is 189053330023.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 256344753025 + 63688597956 = 506305^2 + 252366^2 .

It is a cyclic number.

It is not a de Polignac number, because 320033350981 - 2²⁵ = 319999796549 is a prime.

It is a super-2 number, since 2×320033350981² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 320033350981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320033350181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160016675490 + 160016675491.

It is an arithmetic number, because the mean of its divisors is an integer number (160016675491).

Almost surely, 2^320033350981 is an apocalyptic number.

It is an amenable number.

320033350981 is a deficient number, since it is larger than the sum of its proper divisors (1).

320033350981 is an equidigital number, since it uses as much as digits as its factorization.

320033350981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 58320, while the sum is 37.

The spelling of 320033350981 in words is "three hundred twenty billion, thirty-three million, three hundred fifty thousand, nine hundred eighty-one".