2261172109 has 16 divisors (see below), whose sum is σ = 2634301440. Its totient is φ = 1900727280.

The previous prime is 2261172103. The next prime is 2261172119. The reversal of 2261172109 is 9012711622.

It is a cyclic number.

It is not a de Polignac number, because 2261172109 - 2⁵ = 2261172077 is a prime.

It is a super-2 number, since 2×2261172109² = 10225798613039015762, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2261172103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 171652 + ... + 184354.

It is an arithmetic number, because the mean of its divisors is an integer number (164643840).

Almost surely, 2^2261172109 is an apocalyptic number.

It is an amenable number.

2261172109 is a deficient number, since it is larger than the sum of its proper divisors (373129331).

2261172109 is a wasteful number, since it uses less digits than its factorization.

2261172109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13200.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 2261172109 is about 47551.7834471011. The cubic root of 2261172109 is about 1312.5359475445.

The spelling of 2261172109 in words is "two billion, two hundred sixty-one million, one hundred seventy-two thousand, one hundred nine".