40321023 has 4 divisors (see below), whose sum is σ = 53761368. Its totient is φ = 26880680.

The previous prime is 40321019. The next prime is 40321031. The reversal of 40321023 is 32012304.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40321023 - 2² = 40321019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40320993 and 40321011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40321033) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6720168 + ... + 6720173.

It is an arithmetic number, because the mean of its divisors is an integer number (13440342).

Almost surely, 2^40321023 is an apocalyptic number.

40321023 is a deficient number, since it is larger than the sum of its proper divisors (13440345).

40321023 is a wasteful number, since it uses less digits than its factorization.

40321023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13440344.

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

The square root of 40321023 is about 6349.8836997224. The cubic root of 40321023 is about 342.9076553305.

Adding to 40321023 its reverse (32012304), we get a palindrome (72333327).

The spelling of 40321023 in words is "forty million, three hundred twenty-one thousand, twenty-three".