2891331 has 12 divisors (see below), whose sum is σ = 4214808. Its totient is φ = 1909824.

The previous prime is 2891323. The next prime is 2891341. The reversal of 2891331 is 1331982.

It is not a de Polignac number, because 2891331 - 2³ = 2891323 is a prime.

It is a super-2 number, since 2×2891331² = 16719589903122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2891295 and 2891304.

It is not an unprimeable number, because it can be changed into a prime (2891341) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 405 + ... + 2438.

It is an arithmetic number, because the mean of its divisors is an integer number (351234).

2^2891331 is an apocalyptic number.

2891331 is a deficient number, since it is larger than the sum of its proper divisors (1323477).

2891331 is a wasteful number, since it uses less digits than its factorization.

2891331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2962 (or 2959 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 2891331 is about 1700.3914255253. The cubic root of 2891331 is about 142.4620767044.

The spelling of 2891331 in words is "two million, eight hundred ninety-one thousand, three hundred thirty-one".