331703213 has 2 divisors, whose sum is σ = 331703214. Its totient is φ = 331703212.

The previous prime is 331703191. The next prime is 331703257. The reversal of 331703213 is 312307133.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 287573764 + 44129449 = 16958^2 + 6643^2 .

It is a cyclic number.

It is not a de Polignac number, because 331703213 - 2¹⁸ = 331441069 is a prime.

It is a super-2 number, since 2×331703213² = 220054043029046738, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (331703293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165851606 + 165851607.

It is an arithmetic number, because the mean of its divisors is an integer number (165851607).

Almost surely, 2^331703213 is an apocalyptic number.

It is an amenable number.

331703213 is a deficient number, since it is larger than the sum of its proper divisors (1).

331703213 is an equidigital number, since it uses as much as digits as its factorization.

331703213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1134, while the sum is 23.

The square root of 331703213 is about 18212.7211860282. The cubic root of 331703213 is about 692.2291645533.

The spelling of 331703213 in words is "three hundred thirty-one million, seven hundred three thousand, two hundred thirteen".