40313231 has 36 divisors (see below), whose sum is σ = 51599592. Its totient is φ = 31370976.

The previous prime is 40313201. The next prime is 40313243. The reversal of 40313231 is 13231304.

It is a happy number.

40313231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 40313231 - 2⁶ = 40313167 is a prime.

It is a super-2 number, since 2×40313231² = 3250313187318722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40313201) 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 in 35 ways as a sum of consecutive naturals, for example, 760601 + ... + 760653.

It is an arithmetic number, because the mean of its divisors is an integer number (1433322).

Almost surely, 2^40313231 is an apocalyptic number.

40313231 is a deficient number, since it is larger than the sum of its proper divisors (11286361).

40313231 is a wasteful number, since it uses less digits than its factorization.

40313231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148 (or 122 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 40313231 is about 6349.2701155330. The cubic root of 40313231 is about 342.8855650462.

Adding to 40313231 its reverse (13231304), we get a palindrome (53544535).

The spelling of 40313231 in words is "forty million, three hundred thirteen thousand, two hundred thirty-one".