2081931 has 8 divisors (see below), whose sum is σ = 2840640. Its totient is φ = 1355592.

The previous prime is 2081927. The next prime is 2081969. The reversal of 2081931 is 1391802.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2081931 - 2² = 2081927 is a prime.

It is a super-2 number, since 2×2081931² = 8668873377522, which contains 22 as substring.

2081931 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2081921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7941 + ... + 8198.

It is an arithmetic number, because the mean of its divisors is an integer number (355080).

2^2081931 is an apocalyptic number.

2081931 is a deficient number, since it is larger than the sum of its proper divisors (758709).

2081931 is a wasteful number, since it uses less digits than its factorization.

2081931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16185.

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 2081931 is about 1442.8898086826. The cubic root of 2081931 is about 127.6895757331.

The spelling of 2081931 in words is "two million, eighty-one thousand, nine hundred thirty-one".