1161236216 has 32 divisors (see below), whose sum is σ = 2489456640. Its totient is φ = 497454048.

The previous prime is 1161236203. The next prime is 1161236227. The reversal of 1161236216 is 6126321611.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 246701 + ... + 251363.

It is an arithmetic number, because the mean of its divisors is an integer number (77795520).

Almost surely, 2^1161236216 is an apocalyptic number.

It is an amenable number.

1161236216 is an abundant number, since it is smaller than the sum of its proper divisors (1328220424).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1161236216 is a wasteful number, since it uses less digits than its factorization.

1161236216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9123 (or 9119 counting only the distinct ones).

The product of its digits is 2592, while the sum is 29.

The square root of 1161236216 is about 34076.9161750297. The cubic root of 1161236216 is about 1051.0906930995.

Adding to 1161236216 its reverse (6126321611), we get a palindrome (7287557827).

The spelling of 1161236216 in words is "one billion, one hundred sixty-one million, two hundred thirty-six thousand, two hundred sixteen".