220073261 has 4 divisors (see below), whose sum is σ = 220697052. Its totient is φ = 219449472.

The previous prime is 220073251. The next prime is 220073267. The reversal of 220073261 is 162370022.

220073261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 103022500 + 117050761 = 10150^2 + 10819^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220073261 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220073267) 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, 311366 + ... + 312071.

It is an arithmetic number, because the mean of its divisors is an integer number (55174263).

Almost surely, 2^220073261 is an apocalyptic number.

It is an amenable number.

220073261 is a deficient number, since it is larger than the sum of its proper divisors (623791).

220073261 is an equidigital number, since it uses as much as digits as its factorization.

220073261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 623790.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 220073261 is about 14834.8663964324. The cubic root of 220073261 is about 603.7480757568.

The spelling of 220073261 in words is "two hundred twenty million, seventy-three thousand, two hundred sixty-one".