331661133 has 12 divisors (see below), whose sum is σ = 483718560. Its totient is φ = 218960136.

The previous prime is 331661101. The next prime is 331661137. The reversal of 331661133 is 331166133.

331661133 is a `hidden beast` number, since 3 + 3 + 16 + 611 + 33 = 666.

It is not a de Polignac number, because 331661133 - 2⁵ = 331661101 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 331661097 and 331661106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331661137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 177963 + ... + 179816.

It is an arithmetic number, because the mean of its divisors is an integer number (40309880).

Almost surely, 2^331661133 is an apocalyptic number.

It is an amenable number.

331661133 is a deficient number, since it is larger than the sum of its proper divisors (152057427).

331661133 is a wasteful number, since it uses less digits than its factorization.

331661133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357888 (or 357885 counting only the distinct ones).

The product of its digits is 2916, while the sum is 27.

The square root of 331661133 is about 18211.5659129027. The cubic root of 331661133 is about 692.1998911607.

The spelling of 331661133 in words is "three hundred thirty-one million, six hundred sixty-one thousand, one hundred thirty-three".