2656531 has 4 divisors (see below), whose sum is σ = 2659864. Its totient is φ = 2653200.

The previous prime is 2656529. The next prime is 2656547. The reversal of 2656531 is 1356562.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2656531 - 2¹ = 2656529 is a prime.

It is a super-2 number, since 2×2656531² = 14114313907922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2656531.

It is not an unprimeable number, because it can be changed into a prime (2656501) 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, 316 + ... + 2326.

It is an arithmetic number, because the mean of its divisors is an integer number (664966).

2^2656531 is an apocalyptic number.

2656531 is a deficient number, since it is larger than the sum of its proper divisors (3333).

2656531 is a wasteful number, since it uses less digits than its factorization.

2656531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3332.

The product of its digits is 5400, while the sum is 28.

The square root of 2656531 is about 1629.8868058856. The cubic root of 2656531 is about 138.4963398356.

The spelling of 2656531 in words is "two million, six hundred fifty-six thousand, five hundred thirty-one".