215065064323 has 4 divisors (see below), whose sum is σ = 218094149808. Its totient is φ = 212035978840.

The previous prime is 215065064317. The next prime is 215065064327. The reversal of 215065064323 is 323460560512.

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-215065064323 is a prime.

It is a super-2 number, since 2×215065064323² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (215065064327) 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, 1514542636 + ... + 1514542777.

It is an arithmetic number, because the mean of its divisors is an integer number (54523537452).

Almost surely, 2^215065064323 is an apocalyptic number.

215065064323 is a deficient number, since it is larger than the sum of its proper divisors (3029085485).

215065064323 is an equidigital number, since it uses as much as digits as its factorization.

215065064323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3029085484.

The product of its (nonzero) digits is 129600, while the sum is 37.

The spelling of 215065064323 in words is "two hundred fifteen billion, sixty-five million, sixty-four thousand, three hundred twenty-three".