15312311413212 has 96 divisors (see below), whose sum is σ = 39364434031104. Its totient is φ = 4593967718400.

The previous prime is 15312311413187. The next prime is 15312311413237. The reversal of 15312311413212 is 21231411321351.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (15312311413187) and next prime (15312311413237).

It is a self number, because there is not a number n which added to its sum of digits gives 15312311413212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 58836012 + ... + 59095692.

It is an arithmetic number, because the mean of its divisors is an integer number (410046187824).

Almost surely, 2^{15312311413212} is an apocalyptic number.

15312311413212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15312311413212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19682217015552).

15312311413212 is an abundant number, since it is smaller than the sum of its proper divisors (24052122617892).

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

15312311413212 is a wasteful number, since it uses less digits than its factorization.

15312311413212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264139 (or 264137 counting only the distinct ones).

The product of its digits is 4320, while the sum is 30.

Adding to 15312311413212 its reverse (21231411321351), we get a palindrome (36543722734563).

The spelling of 15312311413212 in words is "fifteen trillion, three hundred twelve billion, three hundred eleven million, four hundred thirteen thousand, two hundred twelve".