220311197 has 2 divisors, whose sum is σ = 220311198. Its totient is φ = 220311196.

The previous prime is 220311193. The next prime is 220311229. The reversal of 220311197 is 791113022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 145419481 + 74891716 = 12059^2 + 8654^2 .

It is a cyclic number.

It is not a de Polignac number, because 220311197 - 2² = 220311193 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220311193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110155598 + 110155599.

It is an arithmetic number, because the mean of its divisors is an integer number (110155599).

Almost surely, 2^220311197 is an apocalyptic number.

It is an amenable number.

220311197 is a deficient number, since it is larger than the sum of its proper divisors (1).

220311197 is an equidigital number, since it uses as much as digits as its factorization.

220311197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 756, while the sum is 26.

The square root of 220311197 is about 14842.8837157744. The cubic root of 220311197 is about 603.9655816023.

The spelling of 220311197 in words is "two hundred twenty million, three hundred eleven thousand, one hundred ninety-seven".