2261165838 has 8 divisors (see below), whose sum is σ = 4522331688. Its totient is φ = 753721944.

The previous prime is 2261165833. The next prime is 2261165891. The reversal of 2261165838 is 8385611622.

It is a sphenic number, since it is the product of 3 distinct primes.

2261165838 is an admirable number.

It is a super-2 number, since 2×2261165838² = 10225741893876484488, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2261165838.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2261165831) 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, 188430481 + ... + 188430492.

It is an arithmetic number, because the mean of its divisors is an integer number (565291461).

Almost surely, 2^2261165838 is an apocalyptic number.

2261165838 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2261165838 is a wasteful number, since it uses less digits than its factorization.

2261165838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376860978.

The product of its digits is 138240, while the sum is 42.

The square root of 2261165838 is about 47551.7175084139. The cubic root of 2261165838 is about 1312.5347341738.

The spelling of 2261165838 in words is "two billion, two hundred sixty-one million, one hundred sixty-five thousand, eight hundred thirty-eight".