40653271 has 4 divisors (see below), whose sum is σ = 40691232. Its totient is φ = 40615312.

The previous prime is 40653257. The next prime is 40653281. The reversal of 40653271 is 17235604.

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-40653271 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40653281) 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, 17326 + ... + 19531.

It is an arithmetic number, because the mean of its divisors is an integer number (10172808).

Almost surely, 2^40653271 is an apocalyptic number.

40653271 is a deficient number, since it is larger than the sum of its proper divisors (37961).

40653271 is a wasteful number, since it uses less digits than its factorization.

40653271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37960.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 40653271 is about 6375.9917659922. The cubic root of 40653271 is about 343.8469409897.

Adding to 40653271 its reverse (17235604), we get a palindrome (57888875).

The spelling of 40653271 in words is "forty million, six hundred fifty-three thousand, two hundred seventy-one".