40100831 has 2 divisors, whose sum is σ = 40100832. Its totient is φ = 40100830.

The previous prime is 40100813. The next prime is 40100839. The reversal of 40100831 is 13800104.

It is a happy number.

Together with previous prime (40100813) 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 a de Polignac number, because none of the positive numbers 2^k-40100831 is a prime.

It is a super-2 number, since 2×40100831² = 3216153293781122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40100839) 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, 20050415 + 20050416.

It is an arithmetic number, because the mean of its divisors is an integer number (20050416).

Almost surely, 2^40100831 is an apocalyptic number.

40100831 is a deficient number, since it is larger than the sum of its proper divisors (1).

40100831 is an equidigital number, since it uses as much as digits as its factorization.

40100831 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 40100831 is about 6332.5216936067. The cubic root of 40100831 is about 342.2823125205.

Adding to 40100831 its reverse (13800104), we get a palindrome (53900935).

The spelling of 40100831 in words is "forty million, one hundred thousand, eight hundred thirty-one".