331545133 has 2 divisors, whose sum is σ = 331545134. Its totient is φ = 331545132.

The previous prime is 331545107. The next prime is 331545143.

331545133 is nontrivially palindromic in base 10.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 195636169 + 135908964 = 13987^2 + 11658^2 .

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 331545133 - 2⁹ = 331544621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (331545143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165772566 + 165772567.

It is an arithmetic number, because the mean of its divisors is an integer number (165772567).

Almost surely, 2^331545133 is an apocalyptic number.

It is an amenable number.

331545133 is a deficient number, since it is larger than the sum of its proper divisors (1).

331545133 is an equidigital number, since it uses as much as digits as its factorization.

331545133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8100, while the sum is 28.

The square root of 331545133 is about 18208.3808450944. The cubic root of 331545133 is about 692.1191817233.

The spelling of 331545133 in words is "three hundred thirty-one million, five hundred forty-five thousand, one hundred thirty-three".