2611256831 has 16 divisors (see below), whose sum is σ = 2929983840. Its totient is φ = 2315013120.

The previous prime is 2611256807. The next prime is 2611256881. The reversal of 2611256831 is 1386521162.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2611256831 is a prime.

It is a super-2 number, since 2×2611256831² = 13637324474888325122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2611256791 and 2611256800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2611256801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44381 + ... + 84806.

It is an arithmetic number, because the mean of its divisors is an integer number (183123990).

Almost surely, 2^2611256831 is an apocalyptic number.

2611256831 is a deficient number, since it is larger than the sum of its proper divisors (318727009).

2611256831 is a wasteful number, since it uses less digits than its factorization.

2611256831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129274.

The product of its digits is 17280, while the sum is 35.

The square root of 2611256831 is about 51100.4582269083. The cubic root of 2611256831 is about 1377.0504866266.

Adding to 2611256831 its reverse (1386521162), we get a palindrome (3997777993).

The spelling of 2611256831 in words is "two billion, six hundred eleven million, two hundred fifty-six thousand, eight hundred thirty-one".