40045471 has 4 divisors (see below), whose sum is σ = 40100112. Its totient is φ = 39990832.

The previous prime is 40045441. The next prime is 40045487. The reversal of 40045471 is 17454004.

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 40045471 - 2⁹ = 40044959 is a prime.

It is a super-3 number, since 3×40045471³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40045441) 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, 26206 + ... + 27691.

It is an arithmetic number, because the mean of its divisors is an integer number (10025028).

Almost surely, 2^40045471 is an apocalyptic number.

40045471 is a deficient number, since it is larger than the sum of its proper divisors (54641).

40045471 is an equidigital number, since it uses as much as digits as its factorization.

40045471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54640.

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 40045471 is about 6328.1490974850. The cubic root of 40045471 is about 342.1247307884.

Adding to 40045471 its reverse (17454004), we get a palindrome (57499475).

The spelling of 40045471 in words is "forty million, forty-five thousand, four hundred seventy-one".