2261642531 has 2 divisors, whose sum is σ = 2261642532. Its totient is φ = 2261642530.

The previous prime is 2261642507. The next prime is 2261642587. The reversal of 2261642531 is 1352461622.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2261642531 - 2²⁶ = 2194533667 is a prime.

It is a super-2 number, since 2×2261642531² = 10230053876056171922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2261645531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1130821265 + 1130821266.

It is an arithmetic number, because the mean of its divisors is an integer number (1130821266).

Almost surely, 2^2261642531 is an apocalyptic number.

2261642531 is a deficient number, since it is larger than the sum of its proper divisors (1).

2261642531 is an equidigital number, since it uses as much as digits as its factorization.

2261642531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280, while the sum is 32.

The square root of 2261642531 is about 47556.7296079114. The cubic root of 2261642531 is about 1312.6269627264.

The spelling of 2261642531 in words is "two billion, two hundred sixty-one million, six hundred forty-two thousand, five hundred thirty-one".