1213022616 has 32 divisors (see below), whose sum is σ = 3265830960. Its totient is φ = 373237632.

The previous prime is 1213022581. The next prime is 1213022623. The reversal of 1213022616 is 6162203121.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1943635 + ... + 1944258.

Almost surely, 2^1213022616 is an apocalyptic number.

It is an amenable number.

1213022616 is an abundant number, since it is smaller than the sum of its proper divisors (2052808344).

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

1213022616 is a wasteful number, since it uses less digits than its factorization.

1213022616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3887915 (or 3887911 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 1213022616 is about 34828.4742129195. The cubic root of 1213022616 is about 1066.4888009851.

Adding to 1213022616 its reverse (6162203121), we get a palindrome (7375225737).

The spelling of 1213022616 in words is "one billion, two hundred thirteen million, twenty-two thousand, six hundred sixteen".