15533022012 has 12 divisors (see below), whose sum is σ = 36243718056. Its totient is φ = 5177674000.

The previous prime is 15533022007. The next prime is 15533022047. The reversal of 15533022012 is 21022033551.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 647209239 + ... + 647209262.

It is an arithmetic number, because the mean of its divisors is an integer number (3020309838).

Almost surely, 2^15533022012 is an apocalyptic number.

15533022012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

15533022012 is an abundant number, since it is smaller than the sum of its proper divisors (20710696044).

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

15533022012 is a wasteful number, since it uses less digits than its factorization.

15533022012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1294418508 (or 1294418506 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

Adding to 15533022012 its reverse (21022033551), we get a palindrome (36555055563).

The spelling of 15533022012 in words is "fifteen billion, five hundred thirty-three million, twenty-two thousand, twelve".