40052321 has 4 divisors (see below), whose sum is σ = 40212144. Its totient is φ = 39892500.

The previous prime is 40052317. The next prime is 40052339. The reversal of 40052321 is 12325004.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40052321 - 2² = 40052317 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 40052321.

It is not an unprimeable number, because it can be changed into a prime (40052351) 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 3 ways as a sum of consecutive naturals, for example, 79535 + ... + 80036.

It is an arithmetic number, because the mean of its divisors is an integer number (10053036).

Almost surely, 2^40052321 is an apocalyptic number.

It is an amenable number.

40052321 is a deficient number, since it is larger than the sum of its proper divisors (159823).

40052321 is a wasteful number, since it uses less digits than its factorization.

40052321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159822.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 40052321 is about 6328.6903068486. The cubic root of 40052321 is about 342.1442371207.

Adding to 40052321 its reverse (12325004), we get a palindrome (52377325).

The spelling of 40052321 in words is "forty million, fifty-two thousand, three hundred twenty-one".