331661152971 has 24 divisors (see below), whose sum is σ = 482212592576. Its totient is φ = 219659940720.

The previous prime is 331661152969. The next prime is 331661152973. The reversal of 331661152971 is 179251166133.

331661152971 is a `hidden beast` number, since 3 + 3 + 1 + 6 + 611 + 5 + 29 + 7 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (331661152969) and next prime (331661152973).

It is not a de Polignac number, because 331661152971 - 2¹ = 331661152969 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (331661152973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 646356 + ... + 1039758.

Almost surely, 2^331661152971 is an apocalyptic number.

331661152971 is a deficient number, since it is larger than the sum of its proper divisors (150551439605).

331661152971 is a wasteful number, since it uses less digits than its factorization.

331661152971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394023 (or 394020 counting only the distinct ones).

The product of its digits is 204120, while the sum is 45.

The spelling of 331661152971 in words is "three hundred thirty-one billion, six hundred sixty-one million, one hundred fifty-two thousand, nine hundred seventy-one".