331628533 has 2 divisors, whose sum is σ = 331628534. Its totient is φ = 331628532.

The previous prime is 331628519. The next prime is 331628573. The reversal of 331628533 is 335826133.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 211353444 + 120275089 = 14538^2 + 10967^2 .

It is a cyclic number.

It is not a de Polignac number, because 331628533 - 2⁵ = 331628501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (331628573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165814266 + 165814267.

It is an arithmetic number, because the mean of its divisors is an integer number (165814267).

Almost surely, 2^331628533 is an apocalyptic number.

It is an amenable number.

331628533 is a deficient number, since it is larger than the sum of its proper divisors (1).

331628533 is an equidigital number, since it uses as much as digits as its factorization.

331628533 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 34.

The square root of 331628533 is about 18210.6708552980. The cubic root of 331628533 is about 692.1772109272.

The spelling of 331628533 in words is "three hundred thirty-one million, six hundred twenty-eight thousand, five hundred thirty-three".