220311229 has 2 divisors, whose sum is σ = 220311230. Its totient is φ = 220311228.

The previous prime is 220311197. The next prime is 220311233. The reversal of 220311229 is 922113022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 182304004 + 38007225 = 13502^2 + 6165^2 .

It is a cyclic number.

It is not a de Polignac number, because 220311229 - 2⁵ = 220311197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220311239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110155614 + 110155615.

It is an arithmetic number, because the mean of its divisors is an integer number (110155615).

Almost surely, 2^220311229 is an apocalyptic number.

It is an amenable number.

220311229 is a deficient number, since it is larger than the sum of its proper divisors (1).

220311229 is an equidigital number, since it uses as much as digits as its factorization.

220311229 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 220311229 is about 14842.8847937320. The cubic root of 220311229 is about 603.9656108441.

The spelling of 220311229 in words is "two hundred twenty million, three hundred eleven thousand, two hundred twenty-nine".