40230331 has 2 divisors, whose sum is σ = 40230332. Its totient is φ = 40230330.

The previous prime is 40230329. The next prime is 40230341. The reversal of 40230331 is 13303204.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40230331 - 2¹ = 40230329 is a prime.

It is a super-2 number, since 2×40230331² = 3236959064739122, which contains 22 as substring.

Together with 40230329, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (40230301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20115165 + 20115166.

It is an arithmetic number, because the mean of its divisors is an integer number (20115166).

Almost surely, 2^40230331 is an apocalyptic number.

40230331 is the 4012-nd centered pentagonal number.

40230331 is a deficient number, since it is larger than the sum of its proper divisors (1).

40230331 is an equidigital number, since it uses as much as digits as its factorization.

40230331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 16.

The square root of 40230331 is about 6342.7384464441. The cubic root of 40230331 is about 342.6503674909.

Adding to 40230331 its reverse (13303204), we get a palindrome (53533535).

The spelling of 40230331 in words is "forty million, two hundred thirty thousand, three hundred thirty-one".