2569631 has 4 divisors (see below), whose sum is σ = 2624352. Its totient is φ = 2514912.

The previous prime is 2569607. The next prime is 2569649. The reversal of 2569631 is 1369652.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2569631 is a prime.

It is a super-2 number, since 2×2569631² = 13206006952322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2569681) 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, 27290 + ... + 27383.

It is an arithmetic number, because the mean of its divisors is an integer number (656088).

2^2569631 is an apocalyptic number.

2569631 is a deficient number, since it is larger than the sum of its proper divisors (54721).

2569631 is an equidigital number, since it uses as much as digits as its factorization.

2569631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54720.

The product of its digits is 9720, while the sum is 32.

The square root of 2569631 is about 1603.0068621188. The cubic root of 2569631 is about 136.9694108274.

The spelling of 2569631 in words is "two million, five hundred sixty-nine thousand, six hundred thirty-one".