40215271 has 4 divisors (see below), whose sum is σ = 40613544. Its totient is φ = 39817000.

The previous prime is 40215269. The next prime is 40215283. The reversal of 40215271 is 17251204.

It is a happy number.

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 40215271 - 2¹ = 40215269 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 (40215671) 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, 198985 + ... + 199186.

It is an arithmetic number, because the mean of its divisors is an integer number (10153386).

Almost surely, 2^40215271 is an apocalyptic number.

40215271 is a deficient number, since it is larger than the sum of its proper divisors (398273).

40215271 is a wasteful number, since it uses less digits than its factorization.

40215271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398272.

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 40215271 is about 6341.5511509409. The cubic root of 40215271 is about 342.6076057367.

Adding to 40215271 its reverse (17251204), we get a palindrome (57466475).

The spelling of 40215271 in words is "forty million, two hundred fifteen thousand, two hundred seventy-one".