2531881 has 8 divisors (see below), whose sum is σ = 2774304. Its totient is φ = 2291520.

The previous prime is 2531869. The next prime is 2531891. The reversal of 2531881 is 1881352.

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

It is not a de Polignac number, because 2531881 - 2⁹ = 2531369 is a prime.

It is a super-2 number, since 2×2531881² = 12820842796322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2531821) 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, 3366 + ... + 4048.

It is an arithmetic number, because the mean of its divisors is an integer number (346788).

2^2531881 is an apocalyptic number.

It is an amenable number.

2531881 is a deficient number, since it is larger than the sum of its proper divisors (242423).

2531881 is a wasteful number, since it uses less digits than its factorization.

2531881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1031.

The product of its digits is 1920, while the sum is 28.

The square root of 2531881 is about 1591.1885494812. The cubic root of 2531881 is about 136.2953679965.

The spelling of 2531881 in words is "two million, five hundred thirty-one thousand, eight hundred eighty-one".