2261165831 has 2 divisors, whose sum is σ = 2261165832. Its totient is φ = 2261165830.

The previous prime is 2261165807. The next prime is 2261165833. The reversal of 2261165831 is 1385611622.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2261165831 is a prime.

It is a super-2 number, since 2×2261165831² = 10225741830563841122, which contains 22 as substring.

Together with 2261165833, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 2261165791 and 2261165800.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2261165833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1130582915 + 1130582916.

It is an arithmetic number, because the mean of its divisors is an integer number (1130582916).

Almost surely, 2^2261165831 is an apocalyptic number.

2261165831 is a deficient number, since it is larger than the sum of its proper divisors (1).

2261165831 is an equidigital number, since it uses as much as digits as its factorization.

2261165831 is an odious number, because the sum of its binary digits is odd.

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

The square root of 2261165831 is about 47551.7174348099. The cubic root of 2261165831 is about 1312.5347328193.

The spelling of 2261165831 in words is "two billion, two hundred sixty-one million, one hundred sixty-five thousand, eight hundred thirty-one".