9912231 has 24 divisors (see below), whose sum is σ = 16748160. Its totient is φ = 5530896.

The previous prime is 9912211. The next prime is 9912251. The reversal of 9912231 is 1322199.

It is an interprime number because it is at equal distance from previous prime (9912211) and next prime (9912251).

It is not a de Polignac number, because 9912231 - 2¹¹ = 9910183 is a prime.

It is a super-2 number, since 2×9912231² = 196504646794722, which contains 22 as substring.

9912231 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 9912195 and 9912204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9912211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 880 + ... + 4538.

It is an arithmetic number, because the mean of its divisors is an integer number (697840).

Almost surely, 2^9912231 is an apocalyptic number.

9912231 is a deficient number, since it is larger than the sum of its proper divisors (6835929).

9912231 is a wasteful number, since it uses less digits than its factorization.

9912231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3715 (or 3712 counting only the distinct ones).

The product of its digits is 972, while the sum is 27.

The square root of 9912231 is about 3148.3695780515. The cubic root of 9912231 is about 214.8113073123.

The spelling of 9912231 in words is "nine million, nine hundred twelve thousand, two hundred thirty-one".