40233231 has 12 divisors (see below), whose sum is σ = 58223880. Its totient is φ = 26771760.

The previous prime is 40233229. The next prime is 40233247. The reversal of 40233231 is 13233204.

40233231 is a `hidden beast` number, since 402 + 33 + 231 = 666.

It is not a de Polignac number, because 40233231 - 2¹ = 40233229 is a prime.

It is a super-2 number, since 2×40233231² = 3237425753398722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40233211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1225 + ... + 9053.

It is an arithmetic number, because the mean of its divisors is an integer number (4851990).

Almost surely, 2^40233231 is an apocalyptic number.

40233231 is a deficient number, since it is larger than the sum of its proper divisors (17990649).

40233231 is a wasteful number, since it uses less digits than its factorization.

40233231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8406 (or 8403 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 40233231 is about 6342.9670502061. The cubic root of 40233231 is about 342.6586006006.

Adding to 40233231 its reverse (13233204), we get a palindrome (53466435).

It can be divided in two parts, 402 and 33231, that added together give a palindrome (33633).

The spelling of 40233231 in words is "forty million, two hundred thirty-three thousand, two hundred thirty-one".