215164293793 has 4 divisors (see below), whose sum is σ = 216245521600. Its totient is φ = 214083065988.

The previous prime is 215164293791. The next prime is 215164293797. The reversal of 215164293793 is 397392461512.

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 215164293793 - 2¹ = 215164293791 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 215164293793.

It is not an unprimeable number, because it can be changed into a prime (215164293791) 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, 540613605 + ... + 540614002.

It is an arithmetic number, because the mean of its divisors is an integer number (54061380400).

Almost surely, 2^215164293793 is an apocalyptic number.

It is an amenable number.

215164293793 is a deficient number, since it is larger than the sum of its proper divisors (1081227807).

215164293793 is a wasteful number, since it uses less digits than its factorization.

215164293793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1081227806.

The product of its digits is 2449440, while the sum is 52.

The spelling of 215164293793 in words is "two hundred fifteen billion, one hundred sixty-four million, two hundred ninety-three thousand, seven hundred ninety-three".