220266261 has 12 divisors (see below), whose sum is σ = 318858540. Its totient is φ = 146522880.

The previous prime is 220266257. The next prime is 220266269. The reversal of 220266261 is 162662022.

It can be written as a sum of positive squares in 2 ways, for example, as 38825361 + 181440900 = 6231^2 + 13470^2 .

It is not a de Polignac number, because 220266261 - 2² = 220266257 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220266269) 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, 22396 + ... + 30693.

It is an arithmetic number, because the mean of its divisors is an integer number (26571545).

Almost surely, 2^220266261 is an apocalyptic number.

It is an amenable number.

220266261 is a deficient number, since it is larger than the sum of its proper divisors (98592279).

220266261 is a wasteful number, since it uses less digits than its factorization.

220266261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53556 (or 53553 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 220266261 is about 14841.3699165542. The cubic root of 220266261 is about 603.9245159898.

The spelling of 220266261 in words is "two hundred twenty million, two hundred sixty-six thousand, two hundred sixty-one".