220553261 has 2 divisors, whose sum is σ = 220553262. Its totient is φ = 220553260.

The previous prime is 220553237. The next prime is 220553293. The reversal of 220553261 is 162355022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 193043236 + 27510025 = 13894^2 + 5245^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220553261 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 220553261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220753261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110276630 + 110276631.

It is an arithmetic number, because the mean of its divisors is an integer number (110276631).

Almost surely, 2^220553261 is an apocalyptic number.

It is an amenable number.

220553261 is a deficient number, since it is larger than the sum of its proper divisors (1).

220553261 is an equidigital number, since it uses as much as digits as its factorization.

220553261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 220553261 is about 14851.0356877896. The cubic root of 220553261 is about 604.1867003572.

The spelling of 220553261 in words is "two hundred twenty million, five hundred fifty-three thousand, two hundred sixty-one".