2221835261 has 6 divisors (see below), whose sum is σ = 2298712890. Its totient is φ = 2144975168.

The previous prime is 2221835257. The next prime is 2221835323. The reversal of 2221835261 is 1625381222.

It can be written as a sum of positive squares in 3 ways, for example, as 1198475161 + 1023360100 = 34619^2 + 31990^2 .

It is not a de Polignac number, because 2221835261 - 2² = 2221835257 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221835221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 249461 + ... + 258213.

It is an arithmetic number, because the mean of its divisors is an integer number (383118815).

Almost surely, 2^2221835261 is an apocalyptic number.

It is an amenable number.

2221835261 is a deficient number, since it is larger than the sum of its proper divisors (76877629).

2221835261 is an frugal number, since it uses more digits than its factorization.

2221835261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17535 (or 8782 counting only the distinct ones).

The product of its digits is 11520, while the sum is 32.

The square root of 2221835261 is about 47136.3475568483. The cubic root of 2221835261 is about 1304.8801308943.

The spelling of 2221835261 in words is "two billion, two hundred twenty-one million, eight hundred thirty-five thousand, two hundred sixty-one".