8207195421 has 8 divisors (see below), whose sum is σ = 10953973504. Its totient is φ = 5465940480.

The previous prime is 8207195419. The next prime is 8207195443. The reversal of 8207195421 is 1245917028.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 8207195421 - 2¹ = 8207195419 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 8207195421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8207155421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1377316 + ... + 1383261.

It is an arithmetic number, because the mean of its divisors is an integer number (1369246688).

Almost surely, 2^8207195421 is an apocalyptic number.

It is an amenable number.

8207195421 is a deficient number, since it is larger than the sum of its proper divisors (2746778083).

8207195421 is a wasteful number, since it uses less digits than its factorization.

8207195421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2761571.

The product of its (nonzero) digits is 40320, while the sum is 39.

The square root of 8207195421 is about 90593.5727355975. The cubic root of 8207195421 is about 2017.1193312334.

The spelling of 8207195421 in words is "eight billion, two hundred seven million, one hundred ninety-five thousand, four hundred twenty-one".