40533431 has 4 divisors (see below), whose sum is σ = 40548672. Its totient is φ = 40518192.

The previous prime is 40533401. The next prime is 40533433. The reversal of 40533431 is 13433504.

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 40533431 - 2¹⁴ = 40517047 is a prime.

It is a super-2 number, since 2×40533431² = 3285918057263522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40533397 and 40533406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40533433) 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, 2471 + ... + 9336.

It is an arithmetic number, because the mean of its divisors is an integer number (10137168).

Almost surely, 2^40533431 is an apocalyptic number.

40533431 is a deficient number, since it is larger than the sum of its proper divisors (15241).

40533431 is a wasteful number, since it uses less digits than its factorization.

40533431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15240.

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 40533431 is about 6366.5870762913. The cubic root of 40533431 is about 343.5087379929.

Adding to 40533431 its reverse (13433504), we get a palindrome (53966935).

The spelling of 40533431 in words is "forty million, five hundred thirty-three thousand, four hundred thirty-one".