2565131 has 4 divisors (see below), whose sum is σ = 2581032. Its totient is φ = 2549232.

The previous prime is 2565109. The next prime is 2565139. The reversal of 2565131 is 1315652.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2565131 - 2⁶ = 2565067 is a prime.

It is a super-2 number, since 2×2565131² = 13159794094322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2565097 and 2565106.

It is not an unprimeable number, because it can be changed into a prime (2565139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7706 + ... + 8031.

It is an arithmetic number, because the mean of its divisors is an integer number (645258).

2^2565131 is an apocalyptic number.

2565131 is a deficient number, since it is larger than the sum of its proper divisors (15901).

2565131 is a wasteful number, since it uses less digits than its factorization.

2565131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15900.

The product of its digits is 900, while the sum is 23.

The square root of 2565131 is about 1601.6026348630. The cubic root of 2565131 is about 136.8894093933.

It can be divided in two parts, 25 and 65131, that added together give a palindrome (65156).

The spelling of 2565131 in words is "two million, five hundred sixty-five thousand, one hundred thirty-one".