220961311 has 2 divisors, whose sum is σ = 220961312. Its totient is φ = 220961310.

The previous prime is 220961303. The next prime is 220961327. The reversal of 220961311 is 113169022.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 220961311 - 2³ = 220961303 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220961371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110480655 + 110480656.

It is an arithmetic number, because the mean of its divisors is an integer number (110480656).

Almost surely, 2^220961311 is an apocalyptic number.

220961311 is a deficient number, since it is larger than the sum of its proper divisors (1).

220961311 is an equidigital number, since it uses as much as digits as its factorization.

220961311 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 220961311 is about 14864.7674384768. The cubic root of 220961311 is about 604.5590767713.

The spelling of 220961311 in words is "two hundred twenty million, nine hundred sixty-one thousand, three hundred eleven".