40303231 has 2 divisors, whose sum is σ = 40303232. Its totient is φ = 40303230.

The previous prime is 40303229. The next prime is 40303253. The reversal of 40303231 is 13230304.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40303231 - 2¹ = 40303229 is a prime.

It is a super-2 number, since 2×40303231² = 3248700858078722, which contains 22 as substring.

Together with 40303229, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40303201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20151615 + 20151616.

It is an arithmetic number, because the mean of its divisors is an integer number (20151616).

Almost surely, 2^40303231 is an apocalyptic number.

40303231 is a deficient number, since it is larger than the sum of its proper divisors (1).

40303231 is an equidigital number, since it uses as much as digits as its factorization.

40303231 is an evil number, because the sum of its binary digits is even.

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

The square root of 40303231 is about 6348.4825746000. The cubic root of 40303231 is about 342.8572109210.

Adding to 40303231 its reverse (13230304), we get a palindrome (53533535).

The spelling of 40303231 in words is "forty million, three hundred three thousand, two hundred thirty-one".