518226493 has 8 divisors (see below), whose sum is σ = 520295328. Its totient is φ = 516162864.

The previous prime is 518226481. The next prime is 518226503. The reversal of 518226493 is 394622815.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 518226493 - 2¹³ = 518218301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (518221493) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 376755 + ... + 378127.

It is an arithmetic number, because the mean of its divisors is an integer number (65036916).

Almost surely, 2^518226493 is an apocalyptic number.

It is an amenable number.

518226493 is a deficient number, since it is larger than the sum of its proper divisors (2068835).

518226493 is a wasteful number, since it uses less digits than its factorization.

518226493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2603.

The product of its digits is 103680, while the sum is 40.

The square root of 518226493 is about 22764.5885752412. The cubic root of 518226493 is about 803.2299071790.

The spelling of 518226493 in words is "five hundred eighteen million, two hundred twenty-six thousand, four hundred ninety-three".