220261549 has 2 divisors, whose sum is σ = 220261550. Its totient is φ = 220261548.

The previous prime is 220261529. The next prime is 220261567. The reversal of 220261549 is 945162022.

220261549 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 182439049 + 37822500 = 13507^2 + 6150^2 .

It is a cyclic number.

It is not a de Polignac number, because 220261549 - 2⁷ = 220261421 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 220261549.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220261519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110130774 + 110130775.

It is an arithmetic number, because the mean of its divisors is an integer number (110130775).

Almost surely, 2^220261549 is an apocalyptic number.

It is an amenable number.

220261549 is a deficient number, since it is larger than the sum of its proper divisors (1).

220261549 is an equidigital number, since it uses as much as digits as its factorization.

220261549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 220261549 is about 14841.2111702516. The cubic root of 220261549 is about 603.9202095160.

The spelling of 220261549 in words is "two hundred twenty million, two hundred sixty-one thousand, five hundred forty-nine".