40203431 has 8 divisors (see below), whose sum is σ = 40711680. Its totient is φ = 39697848.

The previous prime is 40203421. The next prime is 40203433. The reversal of 40203431 is 13430204.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40203431 is a prime.

It is a super-2 number, since 2×40203431² = 3232631728343522, 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 (40203433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64640 + ... + 65258.

It is an arithmetic number, because the mean of its divisors is an integer number (5088960).

Almost surely, 2^40203431 is an apocalyptic number.

40203431 is a deficient number, since it is larger than the sum of its proper divisors (508249).

40203431 is a wasteful number, since it uses less digits than its factorization.

40203431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1333.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 40203431 is about 6340.6175566738. The cubic root of 40203431 is about 342.5739794374.

Adding to 40203431 its reverse (13430204), we get a palindrome (53633635).

The spelling of 40203431 in words is "forty million, two hundred three thousand, four hundred thirty-one".