213322305505 has 4 divisors (see below), whose sum is σ = 255986766612. Its totient is φ = 170657844400.

The previous prime is 213322305491. The next prime is 213322305557. The reversal of 213322305505 is 505503223312.

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 124936799296 + 88385506209 = 353464^2 + 297297^2 .

It is not a de Polignac number, because 213322305505 - 2¹⁹ = 213321781217 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21332230546 + ... + 21332230555.

It is an arithmetic number, because the mean of its divisors is an integer number (63996691653).

Almost surely, 2^213322305505 is an apocalyptic number.

It is an amenable number.

213322305505 is a deficient number, since it is larger than the sum of its proper divisors (42664461107).

213322305505 is an equidigital number, since it uses as much as digits as its factorization.

213322305505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42664461106.

The product of its (nonzero) digits is 27000, while the sum is 31.

Adding to 213322305505 its reverse (505503223312), we get a palindrome (718825528817).

The spelling of 213322305505 in words is "two hundred thirteen billion, three hundred twenty-two million, three hundred five thousand, five hundred five".