220412261 has 2 divisors, whose sum is σ = 220412262. Its totient is φ = 220412260.

The previous prime is 220412251. The next prime is 220412363. The reversal of 220412261 is 162214022.

It is a happy number.

220412261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 210076036 + 10336225 = 14494^2 + 3215^2 .

It is a cyclic number.

It is not a de Polignac number, because 220412261 - 2¹⁰ = 220411237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220412251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110206130 + 110206131.

It is an arithmetic number, because the mean of its divisors is an integer number (110206131).

Almost surely, 2^220412261 is an apocalyptic number.

It is an amenable number.

220412261 is a deficient number, since it is larger than the sum of its proper divisors (1).

220412261 is an equidigital number, since it uses as much as digits as its factorization.

220412261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 220412261 is about 14846.2877851670. The cubic root of 220412261 is about 604.0579204503.

Adding to 220412261 its reverse (162214022), we get a palindrome (382626283).

The spelling of 220412261 in words is "two hundred twenty million, four hundred twelve thousand, two hundred sixty-one".