15311213344145 has 16 divisors (see below), whose sum is σ = 18675094248720. Its totient is φ = 12047887852800.

The previous prime is 15311213344129. The next prime is 15311213344159. The reversal of 15311213344145 is 54144331211351.

It can be written as a sum of positive squares in 8 ways, for example, as 6123452142721 + 9187761201424 = 2474561^2 + 3031132^2 .

It is not a de Polignac number, because 15311213344145 - 2⁴ = 15311213344129 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 15311213344099 and 15311213344108.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13084991 + ... + 14207019.

It is an arithmetic number, because the mean of its divisors is an integer number (1167193390545).

Almost surely, 2^{15311213344145} is an apocalyptic number.

It is an amenable number.

15311213344145 is a deficient number, since it is larger than the sum of its proper divisors (3363880904575).

15311213344145 is a wasteful number, since it uses less digits than its factorization.

15311213344145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1166836.

The product of its digits is 86400, while the sum is 38.

Adding to 15311213344145 its reverse (54144331211351), we get a palindrome (69455544555496).

The spelling of 15311213344145 in words is "fifteen trillion, three hundred eleven billion, two hundred thirteen million, three hundred forty-four thousand, one hundred forty-five".