40011321 has 16 divisors (see below), whose sum is σ = 64179200. Its totient is φ = 21660048.

The previous prime is 40011311. The next prime is 40011331. The reversal of 40011321 is 12311004.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (40011311) and next prime (40011331).

It is not a de Polignac number, because 40011321 - 2¹¹ = 40009273 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40011297 and 40011306.

It is not an unprimeable number, because it can be changed into a prime (40011311) 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 15 ways as a sum of consecutive naturals, for example, 49741 + ... + 50538.

It is an arithmetic number, because the mean of its divisors is an integer number (4011200).

Almost surely, 2^40011321 is an apocalyptic number.

It is an amenable number.

40011321 is a deficient number, since it is larger than the sum of its proper divisors (24167879).

40011321 is a wasteful number, since it uses less digits than its factorization.

40011321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100308.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 40011321 is about 6325.4502606534. The cubic root of 40011321 is about 342.0274506881.

Adding to 40011321 its reverse (12311004), we get a palindrome (52322325).

The spelling of 40011321 in words is "forty million, eleven thousand, three hundred twenty-one".