15525331243212 has 48 divisors (see below), whose sum is σ = 41411048942592. Its totient is φ = 4434719752320.

The previous prime is 15525331243211. The next prime is 15525331243277. The reversal of 15525331243212 is 21234213352551.

15525331243212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×15525331243212² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (15525331243211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22346964 + ... + 23031227.

It is an arithmetic number, because the mean of its divisors is an integer number (862730186304).

Almost surely, 2^{15525331243212} is an apocalyptic number.

15525331243212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

15525331243212 is an abundant number, since it is smaller than the sum of its proper divisors (25885717699380).

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

15525331243212 is a wasteful number, since it uses less digits than its factorization.

15525331243212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45382278 (or 45382276 counting only the distinct ones).

The product of its digits is 216000, while the sum is 39.

Adding to 15525331243212 its reverse (21234213352551), we get a palindrome (36759544595763).

The spelling of 15525331243212 in words is "fifteen trillion, five hundred twenty-five billion, three hundred thirty-one million, two hundred forty-three thousand, two hundred twelve".