518221341 has 48 divisors (see below), whose sum is σ = 851200000. Its totient is φ = 311351040.

The previous prime is 518221339. The next prime is 518221381. The reversal of 518221341 is 143122815.

It is not a de Polignac number, because 518221341 - 2¹ = 518221339 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (518221331) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 414285 + ... + 415533.

Almost surely, 2^518221341 is an apocalyptic number.

It is an amenable number.

518221341 is a deficient number, since it is larger than the sum of its proper divisors (332978659).

518221341 is a wasteful number, since it uses less digits than its factorization.

518221341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1407 (or 1390 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 518221341 is about 22764.4754167541. The cubic root of 518221341 is about 803.2272453736.

The spelling of 518221341 in words is "five hundred eighteen million, two hundred twenty-one thousand, three hundred forty-one".