220591013 has 2 divisors, whose sum is σ = 220591014. Its totient is φ = 220591012.

The previous prime is 220590991. The next prime is 220591027. The reversal of 220591013 is 310195022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 119749249 + 100841764 = 10943^2 + 10042^2 .

It is a cyclic number.

It is not a de Polignac number, because 220591013 - 2⁸ = 220590757 is a prime.

It is equal to p_12153227 and since 220591013 and 12153227 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 220591013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220591913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110295506 + 110295507.

It is an arithmetic number, because the mean of its divisors is an integer number (110295507).

Almost surely, 2^220591013 is an apocalyptic number.

It is an amenable number.

220591013 is a deficient number, since it is larger than the sum of its proper divisors (1).

220591013 is an equidigital number, since it uses as much as digits as its factorization.

220591013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 220591013 is about 14852.3066558700. The cubic root of 220591013 is about 604.2211711768.

The spelling of 220591013 in words is "two hundred twenty million, five hundred ninety-one thousand, thirteen".