1213155466 has 16 divisors (see below), whose sum is σ = 1849165344. Its totient is φ = 596789424.

The previous prime is 1213155403. The next prime is 1213155509. The reversal of 1213155466 is 6645513121.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113196 + ... + 123448.

It is an arithmetic number, because the mean of its divisors is an integer number (115572834).

Almost surely, 2^1213155466 is an apocalyptic number.

1213155466 is a deficient number, since it is larger than the sum of its proper divisors (636009878).

1213155466 is a wasteful number, since it uses less digits than its factorization.

1213155466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11205.

The product of its digits is 21600, while the sum is 34.

The square root of 1213155466 is about 34830.3813645501. The cubic root of 1213155466 is about 1066.5277334455.

Adding to 1213155466 its reverse (6645513121), we get a palindrome (7858668587).

The spelling of 1213155466 in words is "one billion, two hundred thirteen million, one hundred fifty-five thousand, four hundred sixty-six".