220329961 has 2 divisors, whose sum is σ = 220329962. Its totient is φ = 220329960.

The previous prime is 220329953. The next prime is 220330007. The reversal of 220329961 is 169923022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 113827561 + 106502400 = 10669^2 + 10320^2 .

It is a cyclic number.

It is not a de Polignac number, because 220329961 - 2³ = 220329953 is a prime.

It is not a weakly prime, because it can be changed into another prime (220324961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110164980 + 110164981.

It is an arithmetic number, because the mean of its divisors is an integer number (110164981).

Almost surely, 2^220329961 is an apocalyptic number.

It is an amenable number.

220329961 is a deficient number, since it is larger than the sum of its proper divisors (1).

220329961 is an equidigital number, since it uses as much as digits as its factorization.

220329961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 220329961 is about 14843.5157897312. The cubic root of 220329961 is about 603.9827277855.

The spelling of 220329961 in words is "two hundred twenty million, three hundred twenty-nine thousand, nine hundred sixty-one".