2261289631 has 2 divisors, whose sum is σ = 2261289632. Its totient is φ = 2261289630.

The previous prime is 2261289623. The next prime is 2261289647. The reversal of 2261289631 is 1369821622.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2261289631 - 2³ = 2261289623 is a prime.

It is a super-2 number, since 2×2261289631² = 10226861590536232322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2261289671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1130644815 + 1130644816.

It is an arithmetic number, because the mean of its divisors is an integer number (1130644816).

Almost surely, 2^2261289631 is an apocalyptic number.

2261289631 is a deficient number, since it is larger than the sum of its proper divisors (1).

2261289631 is an equidigital number, since it uses as much as digits as its factorization.

2261289631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 40.

The square root of 2261289631 is about 47553.0191575677. The cubic root of 2261289631 is about 1312.5586863676.

The spelling of 2261289631 in words is "two billion, two hundred sixty-one million, two hundred eighty-nine thousand, six hundred thirty-one".