13215223555 has 4 divisors (see below), whose sum is σ = 15858268272. Its totient is φ = 10572178840.

The previous prime is 13215223529. The next prime is 13215223601. The reversal of 13215223555 is 55532251231.

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

It is not a de Polignac number, because 13215223555 - 2²³ = 13206834947 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13215223555.

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, 1321522351 + ... + 1321522360.

It is an arithmetic number, because the mean of its divisors is an integer number (3964567068).

Almost surely, 2^13215223555 is an apocalyptic number.

13215223555 is a deficient number, since it is larger than the sum of its proper divisors (2643044717).

13215223555 is an equidigital number, since it uses as much as digits as its factorization.

13215223555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2643044716.

The product of its digits is 45000, while the sum is 34.

Adding to 13215223555 its reverse (55532251231), we get a palindrome (68747474786).

The spelling of 13215223555 in words is "thirteen billion, two hundred fifteen million, two hundred twenty-three thousand, five hundred fifty-five".