40540215 has 8 divisors (see below), whose sum is σ = 64864368. Its totient is φ = 21621440.

The previous prime is 40540163. The next prime is 40540217. The reversal of 40540215 is 51204504.

40540215 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40540215 - 2¹⁴ = 40523831 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40540191 and 40540200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40540217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1351326 + ... + 1351355.

It is an arithmetic number, because the mean of its divisors is an integer number (8108046).

Almost surely, 2^40540215 is an apocalyptic number.

40540215 is a deficient number, since it is larger than the sum of its proper divisors (24324153).

40540215 is a wasteful number, since it uses less digits than its factorization.

40540215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2702689.

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 40540215 is about 6367.1198355300. The cubic root of 40540215 is about 343.5279010493.

Adding to 40540215 its reverse (51204504), we get a palindrome (91744719).

It can be divided in two parts, 40540 and 215, that added together give a triangular number (40755 = T₂₈₅).

The spelling of 40540215 in words is "forty million, five hundred forty thousand, two hundred fifteen".