1215066163 has 4 divisors (see below), whose sum is σ = 1215676000. Its totient is φ = 1214456328.

The previous prime is 1215066161. The next prime is 1215066217. The reversal of 1215066163 is 3616605121.

It is a semiprime because it is the product of two primes.

It is a 4-Lehmer number, since φ(1215066163) divides (1215066163-1)⁴.

It is a cyclic number.

It is not a de Polignac number, because 1215066163 - 2¹ = 1215066161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1215066161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 301920 + ... + 305917.

It is an arithmetic number, because the mean of its divisors is an integer number (303919000).

Almost surely, 2^1215066163 is an apocalyptic number.

1215066163 is a deficient number, since it is larger than the sum of its proper divisors (609837).

1215066163 is an equidigital number, since it uses as much as digits as its factorization.

1215066163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 609836.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 1215066163 is about 34857.7991703435. The cubic root of 1215066163 is about 1067.0873601092.

The spelling of 1215066163 in words is "one billion, two hundred fifteen million, sixty-six thousand, one hundred sixty-three".