1222001618 has 8 divisors (see below), whose sum is σ = 1834393980. Its totient is φ = 610536960.

The previous prime is 1222001537. The next prime is 1222001639. The reversal of 1222001618 is 8161002221.

It can be written as a sum of positive squares in 2 ways, for example, as 1212223489 + 9778129 = 34817^2 + 3127^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 1222001593 and 1222001602.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 228623 + ... + 233906.

Almost surely, 2^1222001618 is an apocalyptic number.

1222001618 is a deficient number, since it is larger than the sum of its proper divisors (612392362).

1222001618 is a wasteful number, since it uses less digits than its factorization.

1222001618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463852.

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 1222001618 is about 34957.1397285304. The cubic root of 1222001618 is about 1069.1137792538.

Adding to 1222001618 its reverse (8161002221), we get a palindrome (9383003839).

The spelling of 1222001618 in words is "one billion, two hundred twenty-two million, one thousand, six hundred eighteen".