40005331 has 2 divisors, whose sum is σ = 40005332. Its totient is φ = 40005330.

The previous prime is 40005313. The next prime is 40005337. The reversal of 40005331 is 13350004.

Together with previous prime (40005313) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40005331 - 2¹⁵ = 39972563 is a prime.

It is a super-2 number, since 2×40005331² = 3200853016839122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40005337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20002665 + 20002666.

It is an arithmetic number, because the mean of its divisors is an integer number (20002666).

Almost surely, 2^40005331 is an apocalyptic number.

40005331 is a deficient number, since it is larger than the sum of its proper divisors (1).

40005331 is an equidigital number, since it uses as much as digits as its factorization.

40005331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 180, while the sum is 16.

The square root of 40005331 is about 6324.9767588506. The cubic root of 40005331 is about 342.0103817967.

Adding to 40005331 its reverse (13350004), we get a palindrome (53355335).

The spelling of 40005331 in words is "forty million, five thousand, three hundred thirty-one".