2218457493 has 12 divisors (see below), whose sum is σ = 3662215648. Its totient is φ = 1267689960.

The previous prime is 2218457473. The next prime is 2218457519. The reversal of 2218457493 is 3947548122.

2218457493 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2218457493 - 2⁸ = 2218457237 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2218457413) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17606743 + ... + 17606868.

Almost surely, 2^2218457493 is an apocalyptic number.

It is an amenable number.

2218457493 is a deficient number, since it is larger than the sum of its proper divisors (1443758155).

2218457493 is a wasteful number, since it uses less digits than its factorization.

2218457493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35213624 (or 35213621 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The square root of 2218457493 is about 47100.5041692762. The cubic root of 2218457493 is about 1304.2185430209.

The spelling of 2218457493 in words is "two billion, two hundred eighteen million, four hundred fifty-seven thousand, four hundred ninety-three".