331531966 has 4 divisors (see below), whose sum is σ = 497297952. Its totient is φ = 165765982.

The previous prime is 331531961. The next prime is 331531987. The reversal of 331531966 is 669135133.

331531966 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 669135133 = 16519 ⋅40507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331531961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82882990 + ... + 82882993.

It is an arithmetic number, because the mean of its divisors is an integer number (124324488).

Almost surely, 2^331531966 is an apocalyptic number.

331531966 is a deficient number, since it is larger than the sum of its proper divisors (165765986).

331531966 is a wasteful number, since it uses less digits than its factorization.

331531966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165765985.

The product of its digits is 43740, while the sum is 37.

The square root of 331531966 is about 18208.0192772306. The cubic root of 331531966 is about 692.1100193167.

The spelling of 331531966 in words is "three hundred thirty-one million, five hundred thirty-one thousand, nine hundred sixty-six".