321353542403 has 16 divisors (see below), whose sum is σ = 340538688000. Its totient is φ = 302398221312.

The previous prime is 321353542397. The next prime is 321353542421. The reversal of 321353542403 is 304245353123.

It is a cyclic number.

It is not a de Polignac number, because 321353542403 - 2¹⁴ = 321353526019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (321353542463) 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, 4434818 + ... + 4506696.

It is an arithmetic number, because the mean of its divisors is an integer number (21283668000).

Almost surely, 2^321353542403 is an apocalyptic number.

321353542403 is a deficient number, since it is larger than the sum of its proper divisors (19185145597).

321353542403 is a wasteful number, since it uses less digits than its factorization.

321353542403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73474.

The product of its (nonzero) digits is 129600, while the sum is 35.

Adding to 321353542403 its reverse (304245353123), we get a palindrome (625598895526).

The spelling of 321353542403 in words is "three hundred twenty-one billion, three hundred fifty-three million, five hundred forty-two thousand, four hundred three".