220340399 has 2 divisors, whose sum is σ = 220340400. Its totient is φ = 220340398.

The previous prime is 220340389. The next prime is 220340431. The reversal of 220340399 is 993043022.

It is an a-pointer prime, because the next prime (220340431) can be obtained adding 220340399 to its sum of digits (32).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 220340399 - 2¹⁶ = 220274863 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220340389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110170199 + 110170200.

It is an arithmetic number, because the mean of its divisors is an integer number (110170200).

Almost surely, 2^220340399 is an apocalyptic number.

220340399 is a deficient number, since it is larger than the sum of its proper divisors (1).

220340399 is an equidigital number, since it uses as much as digits as its factorization.

220340399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 32.

The square root of 220340399 is about 14843.8673869043. The cubic root of 220340399 is about 603.9922654083.

The spelling of 220340399 in words is "two hundred twenty million, three hundred forty thousand, three hundred ninety-nine".