15205212512 has 24 divisors (see below), whose sum is σ = 34211728656. Its totient is φ = 6516519552.

The previous prime is 15205212511. The next prime is 15205212521. The reversal of 15205212512 is 21521250251.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15205212511) 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 3 ways as a sum of consecutive naturals, for example, 33939983 + ... + 33940430.

It is an arithmetic number, because the mean of its divisors is an integer number (1425488694).

Almost surely, 2^15205212512 is an apocalyptic number.

It is an amenable number.

15205212512 is an abundant number, since it is smaller than the sum of its proper divisors (19006516144).

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

15205212512 is an equidigital number, since it uses as much as digits as its factorization.

15205212512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67880430 (or 67880422 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 26.

Adding to 15205212512 its reverse (21521250251), we get a palindrome (36726462763).

The spelling of 15205212512 in words is "fifteen billion, two hundred five million, two hundred twelve thousand, five hundred twelve".