9231381 has 16 divisors (see below), whose sum is σ = 13936320. Its totient is φ = 6037200.

The previous prime is 9231379. The next prime is 9231401. The reversal of 9231381 is 1831329.

It is not a de Polignac number, because 9231381 - 2¹ = 9231379 is a prime.

It is a super-2 number, since 2×9231381² = 170436790334322, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9231301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1795 + ... + 4656.

It is an arithmetic number, because the mean of its divisors is an integer number (871020).

Almost surely, 2^9231381 is an apocalyptic number.

It is an amenable number.

9231381 is a deficient number, since it is larger than the sum of its proper divisors (4704939).

9231381 is a wasteful number, since it uses less digits than its factorization.

9231381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6513 (or 6507 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 9231381 is about 3038.3187785353. The cubic root of 9231381 is about 209.7758833518.

It can be divided in two parts, 923 and 1381, that added together give a square (2304 = 48²).

The spelling of 9231381 in words is "nine million, two hundred thirty-one thousand, three hundred eighty-one".