2205145261 has 12 divisors (see below), whose sum is σ = 2439909472. Its totient is φ = 1991385000.

The previous prime is 2205145199. The next prime is 2205145273. The reversal of 2205145261 is 1625415022.

It is not a de Polignac number, because 2205145261 - 2³¹ = 57661613 is a prime.

It is a super-2 number, since 2×2205145261² = 9725331244221516242, which contains 22 as substring.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2205145961) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42075 + ... + 78616.

Almost surely, 2^2205145261 is an apocalyptic number.

It is an amenable number.

2205145261 is a deficient number, since it is larger than the sum of its proper divisors (234764211).

2205145261 is a wasteful number, since it uses less digits than its factorization.

2205145261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120864 (or 120853 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 2205145261 is about 46958.9742328343. The cubic root of 2205145261 is about 1301.6045790218.

The spelling of 2205145261 in words is "two billion, two hundred five million, one hundred forty-five thousand, two hundred sixty-one".