1216162137 has 8 divisors (see below), whose sum is σ = 1623189760. Its totient is φ = 809954640.

The previous prime is 1216162121. The next prime is 1216162151. The reversal of 1216162137 is 7312616121.

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

It is not a de Polignac number, because 1216162137 - 2⁴ = 1216162121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1216162117) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 201562 + ... + 207507.

It is an arithmetic number, because the mean of its divisors is an integer number (202898720).

Almost surely, 2^1216162137 is an apocalyptic number.

It is an amenable number.

1216162137 is a deficient number, since it is larger than the sum of its proper divisors (407027623).

1216162137 is an equidigital number, since it uses as much as digits as its factorization.

1216162137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410063.

The product of its digits is 3024, while the sum is 30.

The square root of 1216162137 is about 34873.5162695132. The cubic root of 1216162137 is about 1067.4080967048.

Adding to 1216162137 its reverse (7312616121), we get a palindrome (8528778258).

It can be divided in two parts, 121616 and 2137, that added together give a triangular number (123753 = T₄₉₇).

The spelling of 1216162137 in words is "one billion, two hundred sixteen million, one hundred sixty-two thousand, one hundred thirty-seven".