220657061 has 2 divisors, whose sum is σ = 220657062. Its totient is φ = 220657060.

The previous prime is 220657007. The next prime is 220657091. The reversal of 220657061 is 160756022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 171741025 + 48916036 = 13105^2 + 6994^2 .

It is a cyclic number.

It is not a de Polignac number, because 220657061 - 2¹⁸ = 220394917 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220657001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110328530 + 110328531.

It is an arithmetic number, because the mean of its divisors is an integer number (110328531).

Almost surely, 2^220657061 is an apocalyptic number.

It is an amenable number.

220657061 is a deficient number, since it is larger than the sum of its proper divisors (1).

220657061 is an equidigital number, since it uses as much as digits as its factorization.

220657061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 220657061 is about 14854.5299824666. The cubic root of 220657061 is about 604.2814692175.

The spelling of 220657061 in words is "two hundred twenty million, six hundred fifty-seven thousand, sixty-one".