321023442540433 has 4 divisors (see below), whose sum is σ = 321023688233140. Its totient is φ = 321023196847728.

The previous prime is 321023442540421. The next prime is 321023442540469. The reversal of 321023442540433 is 334045244320123.

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 259437800627329 + 61585641913104 = 16107073^2 + 7847652^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-321023442540433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (321023442540473) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120875910 + ... + 123503167.

It is an arithmetic number, because the mean of its divisors is an integer number (80255922058285).

Almost surely, 2^{321023442540433} is an apocalyptic number.

It is an amenable number.

321023442540433 is a deficient number, since it is larger than the sum of its proper divisors (245692707).

321023442540433 is a wasteful number, since it uses less digits than its factorization.

321023442540433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245692706.

The product of its (nonzero) digits is 829440, while the sum is 40.

Adding to 321023442540433 its reverse (334045244320123), we get a palindrome (655068686860556).

The spelling of 321023442540433 in words is "three hundred twenty-one trillion, twenty-three billion, four hundred forty-two million, five hundred forty thousand, four hundred thirty-three".