12315403442551 has 4 divisors (see below), whose sum is σ = 13434985573704. Its totient is φ = 11195821311400.

The previous prime is 12315403442491. The next prime is 12315403442569. The reversal of 12315403442551 is 15524430451321.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 12315403442551 - 2¹⁵ = 12315403409783 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12315403442581) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 559791065560 + ... + 559791065581.

It is an arithmetic number, because the mean of its divisors is an integer number (3358746393426).

Almost surely, 2^{12315403442551} is an apocalyptic number.

12315403442551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12315403442551 is a deficient number, since it is larger than the sum of its proper divisors (1119582131153).

12315403442551 is a wasteful number, since it uses less digits than its factorization.

12315403442551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1119582131152.

The product of its (nonzero) digits is 288000, while the sum is 40.

Adding to 12315403442551 its reverse (15524430451321), we get a palindrome (27839833893872).

The spelling of 12315403442551 in words is "twelve trillion, three hundred fifteen billion, four hundred three million, four hundred forty-two thousand, five hundred fifty-one".