220345331 has 2 divisors, whose sum is σ = 220345332. Its totient is φ = 220345330.

The previous prime is 220345291. The next prime is 220345369. The reversal of 220345331 is 133543022.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 220345331 - 2²² = 216151027 is a prime.

It is a super-2 number, since 2×220345331² = 97104129786999122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 220345297 and 220345306.

It is not a weakly prime, because it can be changed into another prime (220345031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110172665 + 110172666.

It is an arithmetic number, because the mean of its divisors is an integer number (110172666).

Almost surely, 2^220345331 is an apocalyptic number.

220345331 is a deficient number, since it is larger than the sum of its proper divisors (1).

220345331 is an equidigital number, since it uses as much as digits as its factorization.

220345331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 220345331 is about 14844.0335151872. The cubic root of 220345331 is about 603.9967718714.

Adding to 220345331 its reverse (133543022), we get a palindrome (353888353).

The spelling of 220345331 in words is "two hundred twenty million, three hundred forty-five thousand, three hundred thirty-one".