2531644 has 6 divisors (see below), whose sum is σ = 4430384. Its totient is φ = 1265820.

The previous prime is 2531629. The next prime is 2531653. The reversal of 2531644 is 4461352.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 316452 + ... + 316459.

2^2531644 is an apocalyptic number.

It is an amenable number.

2531644 is a deficient number, since it is larger than the sum of its proper divisors (1898740).

2531644 is a wasteful number, since it uses less digits than its factorization.

2531644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 632915 (or 632913 counting only the distinct ones).

The product of its digits is 2880, while the sum is 25.

The square root of 2531644 is about 1591.1140751059. The cubic root of 2531644 is about 136.2911151624.

Adding to 2531644 its reverse (4461352), we get a palindrome (6992996).

The spelling of 2531644 in words is "two million, five hundred thirty-one thousand, six hundred forty-four".