220303997 has 2 divisors, whose sum is σ = 220303998. Its totient is φ = 220303996.

The previous prime is 220303943. The next prime is 220304023. The reversal of 220303997 is 799303022.

220303997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 217444516 + 2859481 = 14746^2 + 1691^2 .

It is a cyclic number.

It is not a de Polignac number, because 220303997 - 2¹⁸ = 220041853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220303397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110151998 + 110151999.

It is an arithmetic number, because the mean of its divisors is an integer number (110151999).

Almost surely, 2^220303997 is an apocalyptic number.

It is an amenable number.

220303997 is a deficient number, since it is larger than the sum of its proper divisors (1).

220303997 is an equidigital number, since it uses as much as digits as its factorization.

220303997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20412, while the sum is 35.

The square root of 220303997 is about 14842.6411733222. The cubic root of 220303997 is about 603.9590021220.

The spelling of 220303997 in words is "two hundred twenty million, three hundred three thousand, nine hundred ninety-seven".