40542215 has 16 divisors (see below), whose sum is σ = 58019328. Its totient is φ = 26591136.

The previous prime is 40542199. The next prime is 40542221. The reversal of 40542215 is 51224504.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 40542215 - 2⁴ = 40542199 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24377 + ... + 25986.

It is an arithmetic number, because the mean of its divisors is an integer number (3626208).

Almost surely, 2^40542215 is an apocalyptic number.

40542215 is a deficient number, since it is larger than the sum of its proper divisors (17477113).

40542215 is a wasteful number, since it uses less digits than its factorization.

40542215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50398.

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 40542215 is about 6367.2768904768. The cubic root of 40542215 is about 343.5335501273.

Adding to 40542215 its reverse (51224504), we get a palindrome (91766719).

The spelling of 40542215 in words is "forty million, five hundred forty-two thousand, two hundred fifteen".