323115225405545 has 4 divisors (see below), whose sum is σ = 387738270486660. Its totient is φ = 258492180324432.

The previous prime is 323115225405529. The next prime is 323115225405563. The reversal of 323115225405545 is 545504522511323.

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

It can be written as a sum of positive squares in 2 ways, for example, as 149829252706576 + 173285972698969 = 12240476^2 + 13163813^2 .

It is a cyclic number.

It is not a de Polignac number, because 323115225405545 - 2⁴ = 323115225405529 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 323115225405545.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32311522540550 + ... + 32311522540559.

It is an arithmetic number, because the mean of its divisors is an integer number (96934567621665).

Almost surely, 2^{323115225405545} is an apocalyptic number.

It is an amenable number.

323115225405545 is a deficient number, since it is larger than the sum of its proper divisors (64623045081115).

323115225405545 is an equidigital number, since it uses as much as digits as its factorization.

323115225405545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64623045081114.

The product of its (nonzero) digits is 3600000, while the sum is 47.

Adding to 323115225405545 its reverse (545504522511323), we get a palindrome (868619747916868).

The spelling of 323115225405545 in words is "three hundred twenty-three trillion, one hundred fifteen billion, two hundred twenty-five million, four hundred five thousand, five hundred forty-five".