9920303231 has 4 divisors (see below), whose sum is σ = 9931799232. Its totient is φ = 9908807232.

The previous prime is 9920303227. The next prime is 9920303243. The reversal of 9920303231 is 1323030299.

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 9920303231 - 2² = 9920303227 is a prime.

It is a super-2 number, since 2×9920303231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9920303221) 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, 5746706 + ... + 5748431.

It is an arithmetic number, because the mean of its divisors is an integer number (2482949808).

Almost surely, 2^9920303231 is an apocalyptic number.

9920303231 is a deficient number, since it is larger than the sum of its proper divisors (11496001).

9920303231 is a wasteful number, since it uses less digits than its factorization.

9920303231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11496000.

The product of its (nonzero) digits is 8748, while the sum is 32.

The square root of 9920303231 is about 99600.7190285291. The cubic root of 9920303231 is about 2148.6960350549.

The spelling of 9920303231 in words is "nine billion, nine hundred twenty million, three hundred three thousand, two hundred thirty-one".