40543321 has 32 divisors (see below), whose sum is σ = 53222400. Its totient is φ = 29989440.

The previous prime is 40543297. The next prime is 40543331. The reversal of 40543321 is 12334504.

It is not a de Polignac number, because 40543321 - 2⁷ = 40543193 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40543292 and 40543301.

It is not an unprimeable number, because it can be changed into a prime (40543331) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 226410 + ... + 226588.

It is an arithmetic number, because the mean of its divisors is an integer number (1663200).

Almost surely, 2^40543321 is an apocalyptic number.

It is an amenable number.

40543321 is a deficient number, since it is larger than the sum of its proper divisors (12679079).

40543321 is a wasteful number, since it uses less digits than its factorization.

40543321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 40543321 is about 6367.3637401989. The cubic root of 40543321 is about 343.5366739876.

Adding to 40543321 its reverse (12334504), we get a palindrome (52877825).

The spelling of 40543321 in words is "forty million, five hundred forty-three thousand, three hundred twenty-one".