2531863 has 16 divisors (see below), whose sum is σ = 2820096. Its totient is φ = 2265120.

The previous prime is 2531833. The next prime is 2531869. The reversal of 2531863 is 3681352.

It is a cyclic number.

It is not a de Polignac number, because 2531863 - 2⁵ = 2531831 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2531869) 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, 37756 + ... + 37822.

It is an arithmetic number, because the mean of its divisors is an integer number (176256).

2^2531863 is an apocalyptic number.

2531863 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

2531863 is a deficient number, since it is larger than the sum of its proper divisors (288233).

2531863 is a wasteful number, since it uses less digits than its factorization.

2531863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174.

The product of its digits is 4320, while the sum is 28.

The square root of 2531863 is about 1591.1828933218. The cubic root of 2531863 is about 136.2950450058.

It can be divided in two parts, 253 and 1863, that added together give a square (2116 = 46²).

The spelling of 2531863 in words is "two million, five hundred thirty-one thousand, eight hundred sixty-three".