2531651 has 8 divisors (see below), whose sum is σ = 2651184. Its totient is φ = 2414880.

The previous prime is 2531629. The next prime is 2531653. The reversal of 2531651 is 1561352.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2531651 - 2¹⁸ = 2269507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2531653) 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, 1316 + ... + 2606.

It is an arithmetic number, because the mean of its divisors is an integer number (331398).

2^2531651 is an apocalyptic number.

2531651 is a deficient number, since it is larger than the sum of its proper divisors (119533).

2531651 is a wasteful number, since it uses less digits than its factorization.

2531651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1381.

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

The square root of 2531651 is about 1591.1162748209. The cubic root of 2531651 is about 136.2912407773.

Subtracting from 2531651 its reverse (1561352), we obtain a cube (970299 = 99³).

The spelling of 2531651 in words is "two million, five hundred thirty-one thousand, six hundred fifty-one".