671343215 has 4 divisors (see below), whose sum is σ = 805611864. Its totient is φ = 537074568.

The previous prime is 671343199. The next prime is 671343221. The reversal of 671343215 is 512343176.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 671343215 - 2⁴ = 671343199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67134317 + ... + 67134326.

It is an arithmetic number, because the mean of its divisors is an integer number (201402966).

Almost surely, 2^671343215 is an apocalyptic number.

671343215 is a deficient number, since it is larger than the sum of its proper divisors (134268649).

671343215 is a wasteful number, since it uses less digits than its factorization.

671343215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134268648.

The product of its digits is 15120, while the sum is 32.

The square root of 671343215 is about 25910.2916811062. The cubic root of 671343215 is about 875.6183775728.

The spelling of 671343215 in words is "six hundred seventy-one million, three hundred forty-three thousand, two hundred fifteen".