220242493 has 2 divisors, whose sum is σ = 220242494. Its totient is φ = 220242492.

The previous prime is 220242481. The next prime is 220242523. The reversal of 220242493 is 394242022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 117787609 + 102454884 = 10853^2 + 10122^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220242493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220242403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110121246 + 110121247.

It is an arithmetic number, because the mean of its divisors is an integer number (110121247).

Almost surely, 2^220242493 is an apocalyptic number.

It is an amenable number.

220242493 is a deficient number, since it is larger than the sum of its proper divisors (1).

220242493 is an equidigital number, since it uses as much as digits as its factorization.

220242493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 220242493 is about 14840.5691602445. The cubic root of 220242493 is about 603.9027928955.

The spelling of 220242493 in words is "two hundred twenty million, two hundred forty-two thousand, four hundred ninety-three".