320402212243 has 4 divisors (see below), whose sum is σ = 320417025568. Its totient is φ = 320387398920.

The previous prime is 320402212219. The next prime is 320402212271. The reversal of 320402212243 is 342212204023.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320402212243 is a prime.

It is a super-2 number, since 2×320402212243² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320402212343) 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, 7374171 + ... + 7417492.

It is an arithmetic number, because the mean of its divisors is an integer number (80104256392).

Almost surely, 2^320402212243 is an apocalyptic number.

320402212243 is a deficient number, since it is larger than the sum of its proper divisors (14813325).

320402212243 is a wasteful number, since it uses less digits than its factorization.

320402212243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14813324.

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 320402212243 its reverse (342212204023), we get a palindrome (662614416266).

The spelling of 320402212243 in words is "three hundred twenty billion, four hundred two million, two hundred twelve thousand, two hundred forty-three".