220455397 has 2 divisors, whose sum is σ = 220455398. Its totient is φ = 220455396.

The previous prime is 220455383. The next prime is 220455409. The reversal of 220455397 is 793554022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 132733441 + 87721956 = 11521^2 + 9366^2 .

It is a cyclic number.

It is not a de Polignac number, because 220455397 - 2¹¹ = 220453349 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 (220455377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110227698 + 110227699.

It is an arithmetic number, because the mean of its divisors is an integer number (110227699).

Almost surely, 2^220455397 is an apocalyptic number.

It is an amenable number.

220455397 is a deficient number, since it is larger than the sum of its proper divisors (1).

220455397 is an equidigital number, since it uses as much as digits as its factorization.

220455397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 75600, while the sum is 37.

The square root of 220455397 is about 14847.7404678288. The cubic root of 220455397 is about 604.0973237979.

The spelling of 220455397 in words is "two hundred twenty million, four hundred fifty-five thousand, three hundred ninety-seven".