518222001 has 32 divisors (see below), whose sum is σ = 774660096. Its totient is φ = 305424000.

The previous prime is 518221997. The next prime is 518222021. The reversal of 518222001 is 100222815.

It is a happy number.

It is not a de Polignac number, because 518222001 - 2² = 518221997 is a prime.

It is not an unprimeable number, because it can be changed into a prime (518222021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 820956 + ... + 821586.

It is an arithmetic number, because the mean of its divisors is an integer number (24208128).

Almost surely, 2^518222001 is an apocalyptic number.

It is an amenable number.

518222001 is a deficient number, since it is larger than the sum of its proper divisors (256438095).

518222001 is a wasteful number, since it uses less digits than its factorization.

518222001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1293.

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 518222001 is about 22764.4899130202. The cubic root of 518222001 is about 803.2275863668.

Adding to 518222001 its reverse (100222815), we get a palindrome (618444816).

The spelling of 518222001 in words is "five hundred eighteen million, two hundred twenty-two thousand, one".