40204231 has 4 divisors (see below), whose sum is σ = 41184864. Its totient is φ = 39223600.

The previous prime is 40204189. The next prime is 40204243. The reversal of 40204231 is 13240204.

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 40204231 - 2⁷ = 40204103 is a prime.

It is a super-2 number, since 2×40204231² = 3232760380602722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40204261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 490255 + ... + 490336.

It is an arithmetic number, because the mean of its divisors is an integer number (10296216).

Almost surely, 2^40204231 is an apocalyptic number.

40204231 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

40204231 is a deficient number, since it is larger than the sum of its proper divisors (980633).

40204231 is an equidigital number, since it uses as much as digits as its factorization.

40204231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 980632.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 40204231 is about 6340.6806416977. The cubic root of 40204231 is about 342.5762516926.

Adding to 40204231 its reverse (13240204), we get a palindrome (53444435).

The spelling of 40204231 in words is "forty million, two hundred four thousand, two hundred thirty-one".