331605600881 has 4 divisors (see below), whose sum is σ = 331607734500. Its totient is φ = 331603467264.

The previous prime is 331605600847. The next prime is 331605600901. The reversal of 331605600881 is 188006506133.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 188006506133 = 147391 ⋅1275563.

It can be written as a sum of positive squares in 2 ways, for example, as 121493376481 + 210112224400 = 348559^2 + 458380^2 .

It is a cyclic number.

It is not a de Polignac number, because 331605600881 - 2⁶ = 331605600817 is a prime.

It is a super-2 number, since 2×331605600881² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (331605608881) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 813656 + ... + 1151193.

It is an arithmetic number, because the mean of its divisors is an integer number (82901933625).

Almost surely, 2^331605600881 is an apocalyptic number.

It is an amenable number.

331605600881 is a deficient number, since it is larger than the sum of its proper divisors (2133619).

331605600881 is a wasteful number, since it uses less digits than its factorization.

331605600881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2133618.

The product of its (nonzero) digits is 103680, while the sum is 41.

The spelling of 331605600881 in words is "three hundred thirty-one billion, six hundred five million, six hundred thousand, eight hundred eighty-one".