9991254224 has 20 divisors (see below), whose sum is σ = 22123491744. Its totient is φ = 4281966048.

The previous prime is 9991254223. The next prime is 9991254271. The reversal of 9991254224 is 4224521999.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9991254223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44603702 + ... + 44603925.

Almost surely, 2^9991254224 is an apocalyptic number.

It is an amenable number.

9991254224 is an abundant number, since it is smaller than the sum of its proper divisors (12132237520).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9991254224 is a wasteful number, since it uses less digits than its factorization.

9991254224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89207642 (or 89207636 counting only the distinct ones).

The product of its digits is 466560, while the sum is 47.

The square root of 9991254224 is about 99956.2615547420. The cubic root of 9991254224 is about 2153.8064334030.

The spelling of 9991254224 in words is "nine billion, nine hundred ninety-one million, two hundred fifty-four thousand, two hundred twenty-four".