7217997127 has 8 divisors (see below), whose sum is σ = 8128184832. Its totient is φ = 6350143800.

The previous prime is 7217997091. The next prime is 7217997161.

It is a happy number.

7217997127 is nontrivially palindromic in base 10.

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

It is not a de Polignac number, because 7217997127 - 2¹⁹ = 7217472839 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7217997727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10583233 + ... + 10583914.

It is an arithmetic number, because the mean of its divisors is an integer number (1016023104).

Almost surely, 2^7217997127 is an apocalyptic number.

7217997127 is a deficient number, since it is larger than the sum of its proper divisors (910187705).

7217997127 is a wasteful number, since it uses less digits than its factorization.

7217997127 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21167189.

The product of its digits is 777924, while the sum is 52.

The square root of 7217997127 is about 84958.7966428433. The cubic root of 7217997127 is about 1932.5863226766.

The spelling of 7217997127 in words is "seven billion, two hundred seventeen million, nine hundred ninety-seven thousand, one hundred twenty-seven".