40203231 has 4 divisors (see below), whose sum is σ = 53604312. Its totient is φ = 26802152.

The previous prime is 40203227. The next prime is 40203257. The reversal of 40203231 is 13230204.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40203231 - 2² = 40203227 is a prime.

It is a super-2 number, since 2×40203231² = 3232599565678722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40203231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40203211) 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 in 3 ways as a sum of consecutive naturals, for example, 6700536 + ... + 6700541.

It is an arithmetic number, because the mean of its divisors is an integer number (13401078).

Almost surely, 2^40203231 is an apocalyptic number.

40203231 is a deficient number, since it is larger than the sum of its proper divisors (13401081).

40203231 is a wasteful number, since it uses less digits than its factorization.

40203231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13401080.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 40203231 is about 6340.6017853197. The cubic root of 40203231 is about 342.5734113689.

Adding to 40203231 its reverse (13230204), we get a palindrome (53433435).

The spelling of 40203231 in words is "forty million, two hundred three thousand, two hundred thirty-one".