220261511 has 2 divisors, whose sum is σ = 220261512. Its totient is φ = 220261510.

The previous prime is 220261493. The next prime is 220261519. The reversal of 220261511 is 115162022.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220261511 is a prime.

It is a Chen prime.

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 pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110130755 + 110130756.

It is an arithmetic number, because the mean of its divisors is an integer number (110130756).

Almost surely, 2^220261511 is an apocalyptic number.

220261511 is a deficient number, since it is larger than the sum of its proper divisors (1).

220261511 is an equidigital number, since it uses as much as digits as its factorization.

220261511 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 220261511 is about 14841.2098900326. The cubic root of 220261511 is about 603.9201747861.

The spelling of 220261511 in words is "two hundred twenty million, two hundred sixty-one thousand, five hundred eleven".