1216163254 has 8 divisors (see below), whose sum is σ = 1834324128. Its totient is φ = 604721880.

The previous prime is 1216163243. The next prime is 1216163287. The reversal of 1216163254 is 4523616121.

It is a happy number.

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

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1679422 + ... + 1680145.

It is an arithmetic number, because the mean of its divisors is an integer number (229290516).

Almost surely, 2^1216163254 is an apocalyptic number.

1216163254 is a deficient number, since it is larger than the sum of its proper divisors (618160874).

1216163254 is a wasteful number, since it uses less digits than its factorization.

1216163254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3359750.

The product of its digits is 8640, while the sum is 31.

The square root of 1216163254 is about 34873.5322845278. The cubic root of 1216163254 is about 1067.4084234964.

Adding to 1216163254 its reverse (4523616121), we get a palindrome (5739779375).

The spelling of 1216163254 in words is "one billion, two hundred sixteen million, one hundred sixty-three thousand, two hundred fifty-four".