331871881 has 4 divisors (see below), whose sum is σ = 362042064. Its totient is φ = 301701700.

The previous prime is 331871867. The next prime is 331871887. The reversal of 331871881 is 188178133.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 331871881 - 2⁹ = 331871369 is a prime.

It is a super-2 number, since 2×331871881² = 220277890796956322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (331871887) 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 3 ways as a sum of consecutive naturals, for example, 15085075 + ... + 15085096.

It is an arithmetic number, because the mean of its divisors is an integer number (90510516).

Almost surely, 2^331871881 is an apocalyptic number.

It is an amenable number.

331871881 is a deficient number, since it is larger than the sum of its proper divisors (30170183).

331871881 is a wasteful number, since it uses less digits than its factorization.

331871881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30170182.

The product of its digits is 32256, while the sum is 40.

The square root of 331871881 is about 18217.3510972369. The cubic root of 331871881 is about 692.3464753699.

The spelling of 331871881 in words is "three hundred thirty-one million, eight hundred seventy-one thousand, eight hundred eighty-one".