40231321 has 8 divisors (see below), whose sum is σ = 44497544. Its totient is φ = 36132480.

The previous prime is 40231319. The next prime is 40231339. The reversal of 40231321 is 12313204.

It is a happy number.

40231321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 48400 + 40182921 = 220^2 + 6339^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40231321 - 2¹ = 40231319 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40231295 and 40231304.

It is not an unprimeable number, because it can be changed into a prime (40231351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41340 + ... + 42301.

It is an arithmetic number, because the mean of its divisors is an integer number (5562193).

Almost surely, 2^40231321 is an apocalyptic number.

It is an amenable number.

40231321 is a deficient number, since it is larger than the sum of its proper divisors (4266223).

40231321 is a wasteful number, since it uses less digits than its factorization.

40231321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83691.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 40231321 is about 6342.8164879649. The cubic root of 40231321 is about 342.6531781487.

Adding to 40231321 its reverse (12313204), we get a palindrome (52544525).

It can be divided in two parts, 40 and 231321, that added together give a square (231361 = 481²).

The spelling of 40231321 in words is "forty million, two hundred thirty-one thousand, three hundred twenty-one".