221315475343 has 4 divisors (see below), whose sum is σ = 226713413808. Its totient is φ = 215917536880.

The previous prime is 221315475323. The next prime is 221315475361. The reversal of 221315475343 is 343574513122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 343574513122 = 2 ⋅171787256561.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221315475343 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221315475296 and 221315475305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221315475323) 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, 2698969171 + ... + 2698969252.

It is an arithmetic number, because the mean of its divisors is an integer number (56678353452).

Almost surely, 2^221315475343 is an apocalyptic number.

221315475343 is a deficient number, since it is larger than the sum of its proper divisors (5397938465).

221315475343 is an equidigital number, since it uses as much as digits as its factorization.

221315475343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5397938464.

The product of its digits is 302400, while the sum is 40.

Adding to 221315475343 its reverse (343574513122), we get a palindrome (564889988465).

The spelling of 221315475343 in words is "two hundred twenty-one billion, three hundred fifteen million, four hundred seventy-five thousand, three hundred forty-three".