123531032220545 has 8 divisors (see below), whose sum is σ = 148237334321640. Its totient is φ = 98824762005120.

The previous prime is 123531032220523. The next prime is 123531032220571. The reversal of 123531032220545 is 545022230135321.

It can be written as a sum of positive squares in 4 ways, for example, as 50677142588944 + 72853889631601 = 7118788^2 + 8535449^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 123531032220545 - 2¹⁶ = 123531032155009 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 123531032220499 and 123531032220508.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1595621 + ... + 15798989.

It is an arithmetic number, because the mean of its divisors is an integer number (18529666790205).

Almost surely, 2^{123531032220545} is an apocalyptic number.

It is an amenable number.

123531032220545 is a deficient number, since it is larger than the sum of its proper divisors (24706302101095).

123531032220545 is a wasteful number, since it uses less digits than its factorization.

123531032220545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15942835.

The product of its (nonzero) digits is 216000, while the sum is 38.

Adding to 123531032220545 its reverse (545022230135321), we get a palindrome (668553262355866).

The spelling of 123531032220545 in words is "one hundred twenty-three trillion, five hundred thirty-one billion, thirty-two million, two hundred twenty thousand, five hundred forty-five".