321355043245 has 16 divisors (see below), whose sum is σ = 386573544000. Its totient is φ = 256453008768.

The previous prime is 321355043221. The next prime is 321355043267. The reversal of 321355043245 is 542340553123.

It is a cyclic number.

It is not a de Polignac number, because 321355043245 - 2¹⁹ = 321354518957 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4112146 + ... + 4189564.

It is an arithmetic number, because the mean of its divisors is an integer number (24160846500).

Almost surely, 2^321355043245 is an apocalyptic number.

It is an amenable number.

321355043245 is a deficient number, since it is larger than the sum of its proper divisors (65218500755).

321355043245 is a wasteful number, since it uses less digits than its factorization.

321355043245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79452.

The product of its (nonzero) digits is 216000, while the sum is 37.

Adding to 321355043245 its reverse (542340553123), we get a palindrome (863695596368).

The spelling of 321355043245 in words is "three hundred twenty-one billion, three hundred fifty-five million, forty-three thousand, two hundred forty-five".