15321043345 has 16 divisors (see below), whose sum is σ = 18692620560. Its totient is φ = 12052051200.

The previous prime is 15321043343. The next prime is 15321043373. The reversal of 15321043345 is 54334012351.

It can be written as a sum of positive squares in 8 ways, for example, as 2110759249 + 13210284096 = 45943^2 + 114936^2 .

It is not a de Polignac number, because 15321043345 - 2¹ = 15321043343 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15321043343) 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, 1293711 + ... + 1305499.

It is an arithmetic number, because the mean of its divisors is an integer number (1168288785).

Almost surely, 2^15321043345 is an apocalyptic number.

It is an amenable number.

15321043345 is a deficient number, since it is larger than the sum of its proper divisors (3371577215).

15321043345 is a wasteful number, since it uses less digits than its factorization.

15321043345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16116.

The product of its (nonzero) digits is 21600, while the sum is 31.

Adding to 15321043345 its reverse (54334012351), we get a palindrome (69655055696).

The spelling of 15321043345 in words is "fifteen billion, three hundred twenty-one million, forty-three thousand, three hundred forty-five".