2261287393 has 2 divisors, whose sum is σ = 2261287394. Its totient is φ = 2261287392.

The previous prime is 2261287361. The next prime is 2261287411. The reversal of 2261287393 is 3937821622.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1353651264 + 907636129 = 36792^2 + 30127^2 .

It is a cyclic number.

It is not a de Polignac number, because 2261287393 - 2⁵ = 2261287361 is a prime.

It is a super-2 number, since 2×2261287393² = 10226841347481472898, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2261282393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1130643696 + 1130643697.

It is an arithmetic number, because the mean of its divisors is an integer number (1130643697).

Almost surely, 2^2261287393 is an apocalyptic number.

It is an amenable number.

2261287393 is a deficient number, since it is larger than the sum of its proper divisors (1).

2261287393 is an equidigital number, since it uses as much as digits as its factorization.

2261287393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 43.

The square root of 2261287393 is about 47552.9956259330. The cubic root of 2261287393 is about 1312.5582533540.

The spelling of 2261287393 in words is "two billion, two hundred sixty-one million, two hundred eighty-seven thousand, three hundred ninety-three".