2261289539 has 2 divisors, whose sum is σ = 2261289540. Its totient is φ = 2261289538.

The previous prime is 2261289533. The next prime is 2261289623. The reversal of 2261289539 is 9359821622.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2261289539 - 2²⁰ = 2260240963 is a prime.

It is a super-2 number, since 2×2261289539² = 10226860758381665042, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2261289493 and 2261289502.

It is not a weakly prime, because it can be changed into another prime (2261289533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1130644769 + 1130644770.

It is an arithmetic number, because the mean of its divisors is an integer number (1130644770).

Almost surely, 2^2261289539 is an apocalyptic number.

2261289539 is a deficient number, since it is larger than the sum of its proper divisors (1).

2261289539 is an equidigital number, since it uses as much as digits as its factorization.

2261289539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 466560, while the sum is 47.

The square root of 2261289539 is about 47553.0181902264. The cubic root of 2261289539 is about 1312.5586685672.

The spelling of 2261289539 in words is "two billion, two hundred sixty-one million, two hundred eighty-nine thousand, five hundred thirty-nine".