40031471 has 4 divisors (see below), whose sum is σ = 40152744. Its totient is φ = 39910200.

The previous prime is 40031419. The next prime is 40031473. The reversal of 40031471 is 17413004.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40031471 is a prime.

It is a super-3 number, since 3×40031471³ (a number of 24 digits) contains 333 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 (40031473) 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, 60140 + ... + 60801.

It is an arithmetic number, because the mean of its divisors is an integer number (10038186).

Almost surely, 2^40031471 is an apocalyptic number.

40031471 is a deficient number, since it is larger than the sum of its proper divisors (121273).

40031471 is a wasteful number, since it uses less digits than its factorization.

40031471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121272.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 40031471 is about 6327.0428321610. The cubic root of 40031471 is about 342.0848569117.

Adding to 40031471 its reverse (17413004), we get a palindrome (57444475).

The spelling of 40031471 in words is "forty million, thirty-one thousand, four hundred seventy-one".