215717273343 has 72 divisors (see below), whose sum is σ = 381558209760. Its totient is φ = 116519356800.

The previous prime is 215717273339. The next prime is 215717273353. The reversal of 215717273343 is 343372717512.

215717273343 is a `hidden beast` number, since 2 + 1 + 571 + 7 + 2 + 7 + 33 + 43 = 666.

It is not a de Polignac number, because 215717273343 - 2² = 215717273339 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215717273353) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 147838 + ... + 673268.

It is an arithmetic number, because the mean of its divisors is an integer number (5299419580).

Almost surely, 2^215717273343 is an apocalyptic number.

215717273343 is a deficient number, since it is larger than the sum of its proper divisors (165840936417).

215717273343 is a wasteful number, since it uses less digits than its factorization.

215717273343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525501 (or 525487 counting only the distinct ones).

The product of its digits is 740880, while the sum is 45.

The spelling of 215717273343 in words is "two hundred fifteen billion, seven hundred seventeen million, two hundred seventy-three thousand, three hundred forty-three".