215134324553 has 4 divisors (see below), whose sum is σ = 226457183760. Its totient is φ = 203811465348.

The previous prime is 215134324543. The next prime is 215134324579. The reversal of 215134324553 is 355423431512.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 215134324553 - 2²⁰ = 215133275977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (215134324513) 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, 5661429575 + ... + 5661429612.

It is an arithmetic number, because the mean of its divisors is an integer number (56614295940).

Almost surely, 2^215134324553 is an apocalyptic number.

It is an amenable number.

215134324553 is a deficient number, since it is larger than the sum of its proper divisors (11322859207).

215134324553 is a wasteful number, since it uses less digits than its factorization.

215134324553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11322859206.

The product of its digits is 216000, while the sum is 38.

The spelling of 215134324553 in words is "two hundred fifteen billion, one hundred thirty-four million, three hundred twenty-four thousand, five hundred fifty-three".