220698257 has 8 divisors (see below), whose sum is σ = 237912360. Its totient is φ = 203518080.

The previous prime is 220698227. The next prime is 220698259. The reversal of 220698257 is 752896022.

220698257 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 41165056 + 179533201 = 6416^2 + 13399^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 220698257 - 2⁸ = 220698001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220698259) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5957 + ... + 21837.

It is an arithmetic number, because the mean of its divisors is an integer number (29739045).

Almost surely, 2^220698257 is an apocalyptic number.

It is an amenable number.

220698257 is a deficient number, since it is larger than the sum of its proper divisors (17214103).

220698257 is a wasteful number, since it uses less digits than its factorization.

220698257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16963.

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 220698257 is about 14855.9165654631. The cubic root of 220698257 is about 604.3190727129.

The spelling of 220698257 in words is "two hundred twenty million, six hundred ninety-eight thousand, two hundred fifty-seven".