2651831 has 24 divisors (see below), whose sum is σ = 3485664. Its totient is φ = 1995840.

The previous prime is 2651821. The next prime is 2651837. The reversal of 2651831 is 1381562.

It is not a de Polignac number, because 2651831 - 2¹⁰ = 2650807 is a prime.

It is a super-2 number, since 2×2651831² = 14064415305122, which contains 22 as substring.

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 2651831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2651837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14561 + ... + 14741.

It is an arithmetic number, because the mean of its divisors is an integer number (145236).

2^2651831 is an apocalyptic number.

2651831 is a deficient number, since it is larger than the sum of its proper divisors (833833).

2651831 is a wasteful number, since it uses less digits than its factorization.

2651831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231 (or 224 counting only the distinct ones).

The product of its digits is 1440, while the sum is 26.

The square root of 2651831 is about 1628.4443496786. Note that the first 3 decimals coincide. The cubic root of 2651831 is about 138.4146145760.

The spelling of 2651831 in words is "two million, six hundred fifty-one thousand, eight hundred thirty-one".