2531668 has 24 divisors (see below), whose sum is σ = 4656960. Its totient is φ = 1202880.

The previous prime is 2531663. The next prime is 2531687. The reversal of 2531668 is 8661352.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2531663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6873 + ... + 7231.

It is an arithmetic number, because the mean of its divisors is an integer number (194040).

2^2531668 is an apocalyptic number.

It is an amenable number.

2531668 is a deficient number, since it is larger than the sum of its proper divisors (2125292).

2531668 is a wasteful number, since it uses less digits than its factorization.

2531668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447 (or 445 counting only the distinct ones).

The product of its digits is 8640, while the sum is 31.

The square root of 2531668 is about 1591.1216169734. The cubic root of 2531668 is about 136.2915458412.

The spelling of 2531668 in words is "two million, five hundred thirty-one thousand, six hundred sixty-eight".