1213545166 has 8 divisors (see below), whose sum is σ = 1869515640. Its totient is φ = 590373288.

The previous prime is 1213545131. The next prime is 1213545169. The reversal of 1213545166 is 6615453121.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213545169) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8199556 + ... + 8199703.

It is an arithmetic number, because the mean of its divisors is an integer number (233689455).

Almost surely, 2^1213545166 is an apocalyptic number.

1213545166 is a deficient number, since it is larger than the sum of its proper divisors (655970474).

1213545166 is a wasteful number, since it uses less digits than its factorization.

1213545166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16399298.

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

The square root of 1213545166 is about 34835.9751693562. The cubic root of 1213545166 is about 1066.6419208886.

Adding to 1213545166 its reverse (6615453121), we get a palindrome (7828998287).

The spelling of 1213545166 in words is "one billion, two hundred thirteen million, five hundred forty-five thousand, one hundred sixty-six".