1216522134 has 24 divisors (see below), whose sum is σ = 2642694912. Its totient is φ = 404446320.

The previous prime is 1216522133. The next prime is 1216522147. The reversal of 1216522134 is 4312256121.

1216522134 is a `hidden beast` number, since 1 + 2 + 1 + 6 + 522 + 134 = 666.

It is a super-2 number, since 2×1216522134² = 2959852205023827912, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1216522098 and 1216522107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216522133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 81337 + ... + 95124.

It is an arithmetic number, because the mean of its divisors is an integer number (110112288).

Almost surely, 2^1216522134 is an apocalyptic number.

1216522134 is an abundant number, since it is smaller than the sum of its proper divisors (1426172778).

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

1216522134 is a wasteful number, since it uses less digits than its factorization.

1216522134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176852 (or 176849 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 1216522134 is about 34878.6773545099. The cubic root of 1216522134 is about 1067.5134077188.

Adding to 1216522134 its reverse (4312256121), we get a palindrome (5528778255).

The spelling of 1216522134 in words is "one billion, two hundred sixteen million, five hundred twenty-two thousand, one hundred thirty-four".