331991030953 has 2 divisors, whose sum is σ = 331991030954. Its totient is φ = 331991030952.

The previous prime is 331991030947. The next prime is 331991030957. The reversal of 331991030953 is 359030199133.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 323502725529 + 8488305424 = 568773^2 + 92132^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-331991030953 is a prime.

It is a super-2 number, since 2×331991030953² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (331991030957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165995515476 + 165995515477.

It is an arithmetic number, because the mean of its divisors is an integer number (165995515477).

Almost surely, 2^331991030953 is an apocalyptic number.

It is an amenable number.

331991030953 is a deficient number, since it is larger than the sum of its proper divisors (1).

331991030953 is an equidigital number, since it uses as much as digits as its factorization.

331991030953 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 295245, while the sum is 46.

The spelling of 331991030953 in words is "three hundred thirty-one billion, nine hundred ninety-one million, thirty thousand, nine hundred fifty-three".