220400293 has 2 divisors, whose sum is σ = 220400294. Its totient is φ = 220400292.

The previous prime is 220400269. The next prime is 220400309. The reversal of 220400293 is 392004022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 204575809 + 15824484 = 14303^2 + 3978^2 .

It is a cyclic number.

It is not a de Polignac number, because 220400293 - 2¹³ = 220392101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220400233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110200146 + 110200147.

It is an arithmetic number, because the mean of its divisors is an integer number (110200147).

Almost surely, 2^220400293 is an apocalyptic number.

It is an amenable number.

220400293 is a deficient number, since it is larger than the sum of its proper divisors (1).

220400293 is an equidigital number, since it uses as much as digits as its factorization.

220400293 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 220400293 is about 14845.8847159743. The cubic root of 220400293 is about 604.0469871564.

The spelling of 220400293 in words is "two hundred twenty million, four hundred thousand, two hundred ninety-three".