321512054233 has 4 divisors (see below), whose sum is σ = 321528930228. Its totient is φ = 321495178240.

The previous prime is 321512054221. The next prime is 321512054249. The reversal of 321512054233 is 332450215123.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 332450215123 = 13 ⋅25573093471.

It can be written as a sum of positive squares in 2 ways, for example, as 131020833024 + 190491221209 = 361968^2 + 436453^2 .

It is a cyclic number.

It is not a de Polignac number, because 321512054233 - 2²¹ = 321509957081 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 321512054195 and 321512054204.

It is not an unprimeable number, because it can be changed into a prime (321512057233) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 8409388 + ... + 8447533.

It is an arithmetic number, because the mean of its divisors is an integer number (80382232557).

Almost surely, 2^321512054233 is an apocalyptic number.

It is an amenable number.

321512054233 is a deficient number, since it is larger than the sum of its proper divisors (16875995).

321512054233 is a wasteful number, since it uses less digits than its factorization.

321512054233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16875994.

The product of its (nonzero) digits is 21600, while the sum is 31.

Adding to 321512054233 its reverse (332450215123), we get a palindrome (653962269356).

The spelling of 321512054233 in words is "three hundred twenty-one billion, five hundred twelve million, fifty-four thousand, two hundred thirty-three".