15504535212 has 12 divisors (see below), whose sum is σ = 36177248856. Its totient is φ = 5168178400.

The previous prime is 15504535199. The next prime is 15504535217. The reversal of 15504535212 is 21253540551.

15504535212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-2 number, since 2×15504535212² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (15504535217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 646022289 + ... + 646022312.

It is an arithmetic number, because the mean of its divisors is an integer number (3014770738).

Almost surely, 2^15504535212 is an apocalyptic number.

15504535212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

15504535212 is an abundant number, since it is smaller than the sum of its proper divisors (20672713644).

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

15504535212 is a wasteful number, since it uses less digits than its factorization.

15504535212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1292044608 (or 1292044606 counting only the distinct ones).

The product of its (nonzero) digits is 30000, while the sum is 33.

The spelling of 15504535212 in words is "fifteen billion, five hundred four million, five hundred thirty-five thousand, two hundred twelve".