40323021 has 8 divisors (see below), whose sum is σ = 55618080. Its totient is φ = 25954992.

The previous prime is 40323011. The next prime is 40323029. The reversal of 40323021 is 12032304.

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

It is not a de Polignac number, because 40323021 - 2⁹ = 40322509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40323029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 231655 + ... + 231828.

It is an arithmetic number, because the mean of its divisors is an integer number (6952260).

Almost surely, 2^40323021 is an apocalyptic number.

It is an amenable number.

40323021 is a deficient number, since it is larger than the sum of its proper divisors (15295059).

40323021 is a wasteful number, since it uses less digits than its factorization.

40323021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463515.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 40323021 is about 6350.0410234895. The cubic root of 40323021 is about 342.9133191930.

Adding to 40323021 its reverse (12032304), we get a palindrome (52355325).

The spelling of 40323021 in words is "forty million, three hundred twenty-three thousand, twenty-one".