2261599943 has 4 divisors (see below), whose sum is σ = 2283557328. Its totient is φ = 2239642560.

The previous prime is 2261599931. The next prime is 2261599969. The reversal of 2261599943 is 3499951622.

It is a happy number.

2261599943 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2261599943 - 2²⁰ = 2260551367 is a prime.

It is a super-2 number, since 2×2261599943² = 10229668604355206498, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2261599891 and 2261599900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2261599343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10978538 + ... + 10978743.

It is an arithmetic number, because the mean of its divisors is an integer number (570889332).

Almost surely, 2^2261599943 is an apocalyptic number.

2261599943 is a deficient number, since it is larger than the sum of its proper divisors (21957385).

2261599943 is a wasteful number, since it uses less digits than its factorization.

2261599943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21957384.

The product of its digits is 1049760, while the sum is 50.

The square root of 2261599943 is about 47556.2818458298. The cubic root of 2261599943 is about 1312.6187235068.

The spelling of 2261599943 in words is "two billion, two hundred sixty-one million, five hundred ninety-nine thousand, nine hundred forty-three".