1218160237 has 6 divisors (see below), whose sum is σ = 1417043598. Its totient is φ = 1044137304.

The previous prime is 1218160231. The next prime is 1218160253. The reversal of 1218160237 is 7320618121.

It can be written as a sum of positive squares in only one way, i.e., 620308836 + 597851401 = 24906^2 + 24451^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1218160237 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1218160199 and 1218160208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1218160231) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12430158 + ... + 12430255.

It is an arithmetic number, because the mean of its divisors is an integer number (236173933).

Almost surely, 2^1218160237 is an apocalyptic number.

It is an amenable number.

1218160237 is a deficient number, since it is larger than the sum of its proper divisors (198883361).

1218160237 is an equidigital number, since it uses as much as digits as its factorization.

1218160237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24860427 (or 24860420 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 1218160237 is about 34902.1523261818. The cubic root of 1218160237 is about 1067.9923447786.

Adding to 1218160237 its reverse (7320618121), we get a palindrome (8538778358).

The spelling of 1218160237 in words is "one billion, two hundred eighteen million, one hundred sixty thousand, two hundred thirty-seven".