1216522132 has 24 divisors (see below), whose sum is σ = 2460386880. Its totient is φ = 515507520.

The previous prime is 1216522123. The next prime is 1216522133. The reversal of 1216522132 is 2312256121.

It is a junction number, because it is equal to n+sod(n) for n = 1216522097 and 1216522106.

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 polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 241594 + ... + 246577.

It is an arithmetic number, because the mean of its divisors is an integer number (102516120).

Almost surely, 2^1216522132 is an apocalyptic number.

It is an amenable number.

1216522132 is an abundant number, since it is smaller than the sum of its proper divisors (1243864748).

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

1216522132 is a wasteful number, since it uses less digits than its factorization.

1216522132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488271 (or 488269 counting only the distinct ones).

The product of its digits is 1440, while the sum is 25.

The square root of 1216522132 is about 34878.6773258391. The cubic root of 1216522132 is about 1067.5134071338.

Adding to 1216522132 its reverse (2312256121), we get a palindrome (3528778253).

The spelling of 1216522132 in words is "one billion, two hundred sixteen million, five hundred twenty-two thousand, one hundred thirty-two".