40223831 has 2 divisors, whose sum is σ = 40223832. Its totient is φ = 40223830.

The previous prime is 40223789. The next prime is 40223837. The reversal of 40223831 is 13832204.

40223831 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40223831 - 2¹⁸ = 39961687 is a prime.

It is a super-2 number, since 2×40223831² = 3235913160633122, which contains 22 as substring.

It is a Sophie Germain prime.

It is equal to p_2446421 and since 40223831 and 2446421 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 40223797 and 40223806.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40223837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20111915 + 20111916.

It is an arithmetic number, because the mean of its divisors is an integer number (20111916).

Almost surely, 2^40223831 is an apocalyptic number.

40223831 is a deficient number, since it is larger than the sum of its proper divisors (1).

40223831 is an equidigital number, since it uses as much as digits as its factorization.

40223831 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 40223831 is about 6342.2260287694. The cubic root of 40223831 is about 342.6319125317.

The spelling of 40223831 in words is "forty million, two hundred twenty-three thousand, eight hundred thirty-one".