1171056216 has 128 divisors (see below), whose sum is σ = 3315375360. Its totient is φ = 341568000.

The previous prime is 1171056209. The next prime is 1171056239. The reversal of 1171056216 is 6126501711.

It is a super-2 number, since 2×1171056216² = 2742745322064477312, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 985975 + ... + 987161.

It is an arithmetic number, because the mean of its divisors is an integer number (25901370).

Almost surely, 2^1171056216 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1171056216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1657687680).

1171056216 is an abundant number, since it is smaller than the sum of its proper divisors (2144319144).

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

1171056216 is a wasteful number, since it uses less digits than its factorization.

1171056216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1345 (or 1341 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 30.

The square root of 1171056216 is about 34220.6986486249. The cubic root of 1171056216 is about 1054.0452316019.

Adding to 1171056216 its reverse (6126501711), we get a palindrome (7297557927).

It can be divided in two parts, 117105 and 6216, that added together give a palindrome (123321).

The spelling of 1171056216 in words is "one billion, one hundred seventy-one million, fifty-six thousand, two hundred sixteen".