215359855197 has 4 divisors (see below), whose sum is σ = 287146473600. Its totient is φ = 143573236796.

The previous prime is 215359855171. The next prime is 215359855229. The reversal of 215359855197 is 791558953512.

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 215359855197 - 2¹⁵ = 215359822429 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 215359855197.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215359855097) 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, 35893309197 + ... + 35893309202.

It is an arithmetic number, because the mean of its divisors is an integer number (71786618400).

Almost surely, 2^215359855197 is an apocalyptic number.

It is an amenable number.

215359855197 is a deficient number, since it is larger than the sum of its proper divisors (71786618403).

215359855197 is an equidigital number, since it uses as much as digits as its factorization.

215359855197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71786618402.

The product of its digits is 17010000, while the sum is 60.

The spelling of 215359855197 in words is "two hundred fifteen billion, three hundred fifty-nine million, eight hundred fifty-five thousand, one hundred ninety-seven".