331320001 has 2 divisors, whose sum is σ = 331320002. Its totient is φ = 331320000.

The previous prime is 331319999. The next prime is 331320019. The reversal of 331320001 is 100023133.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 312440976 + 18879025 = 17676^2 + 4345^2 .

It is a cyclic number.

It is not a de Polignac number, because 331320001 - 2¹ = 331319999 is a prime.

Together with 331319999, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (331320601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165660000 + 165660001.

It is an arithmetic number, because the mean of its divisors is an integer number (165660001).

Almost surely, 2^331320001 is an apocalyptic number.

It is an amenable number.

331320001 is a deficient number, since it is larger than the sum of its proper divisors (1).

331320001 is an equidigital number, since it uses as much as digits as its factorization.

331320001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54, while the sum is 13.

The square root of 331320001 is about 18202.1976969815. The cubic root of 331320001 is about 691.9624876644.

Adding to 331320001 its reverse (100023133), we get a palindrome (431343134).

The spelling of 331320001 in words is "three hundred thirty-one million, three hundred twenty thousand, one".