9996221215 has 4 divisors (see below), whose sum is σ = 11995465464. Its totient is φ = 7996976968.

The previous prime is 9996221203. The next prime is 9996221231. The reversal of 9996221215 is 5121226999.

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 9996221215 - 2⁷ = 9996221087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 999622117 + ... + 999622126.

It is an arithmetic number, because the mean of its divisors is an integer number (2998866366).

Almost surely, 2^9996221215 is an apocalyptic number.

9996221215 is a deficient number, since it is larger than the sum of its proper divisors (1999244249).

9996221215 is a wasteful number, since it uses less digits than its factorization.

9996221215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1999244248.

The product of its digits is 174960, while the sum is 46.

The square root of 9996221215 is about 99981.1042897607. The cubic root of 9996221215 is about 2154.1632843265.

The spelling of 9996221215 in words is "nine billion, nine hundred ninety-six million, two hundred twenty-one thousand, two hundred fifteen".