2551831 has 2 divisors, whose sum is σ = 2551832. Its totient is φ = 2551830.

The previous prime is 2551823. The next prime is 2551841. The reversal of 2551831 is 1381552.

It is a happy number.

2551831 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2551831 - 2³ = 2551823 is a prime.

It is a super-2 number, since 2×2551831² = 13023682905122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2551796 and 2551805.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2551841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1275915 + 1275916.

It is an arithmetic number, because the mean of its divisors is an integer number (1275916).

2^2551831 is an apocalyptic number.

2551831 is a deficient number, since it is larger than the sum of its proper divisors (1).

2551831 is an equidigital number, since it uses as much as digits as its factorization.

2551831 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1200, while the sum is 25.

The square root of 2551831 is about 1597.4451477281. The cubic root of 2551831 is about 136.6524124204.

The spelling of 2551831 in words is "two million, five hundred fifty-one thousand, eight hundred thirty-one".