2531091 has 16 divisors (see below), whose sum is σ = 3571200. Its totient is φ = 1591968.

The previous prime is 2531083. The next prime is 2531093. The reversal of 2531091 is 1901352.

It is not a de Polignac number, because 2531091 - 2³ = 2531083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2531093) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3780 + ... + 4398.

It is an arithmetic number, because the mean of its divisors is an integer number (223200).

2^2531091 is an apocalyptic number.

2531091 is a deficient number, since it is larger than the sum of its proper divisors (1040109).

2531091 is a wasteful number, since it uses less digits than its factorization.

2531091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 698.

The product of its (nonzero) digits is 270, while the sum is 21.

The square root of 2531091 is about 1590.9402880058. The cubic root of 2531091 is about 136.2811908503.

The spelling of 2531091 in words is "two million, five hundred thirty-one thousand, ninety-one".