220278557 has 2 divisors, whose sum is σ = 220278558. Its totient is φ = 220278556.

The previous prime is 220278517. The next prime is 220278563. The reversal of 220278557 is 755872022.

220278557 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., 148011556 + 72267001 = 12166^2 + 8501^2 .

It is a cyclic number.

It is not a de Polignac number, because 220278557 - 2¹⁴ = 220262173 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 220278557.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220278517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110139278 + 110139279.

It is an arithmetic number, because the mean of its divisors is an integer number (110139279).

Almost surely, 2^220278557 is an apocalyptic number.

It is an amenable number.

220278557 is a deficient number, since it is larger than the sum of its proper divisors (1).

220278557 is an equidigital number, since it uses as much as digits as its factorization.

220278557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 78400, while the sum is 38.

The square root of 220278557 is about 14841.7841582473. The cubic root of 220278557 is about 603.9357534767.

The spelling of 220278557 in words is "two hundred twenty million, two hundred seventy-eight thousand, five hundred fifty-seven".