40217542 has 8 divisors (see below), whose sum is σ = 60386256. Its totient is φ = 20088792.

The previous prime is 40217539. The next prime is 40217549. The reversal of 40217542 is 24571204.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40217549) 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, 7333 + ... + 11584.

It is an arithmetic number, because the mean of its divisors is an integer number (7548282).

Almost surely, 2^40217542 is an apocalyptic number.

40217542 is a deficient number, since it is larger than the sum of its proper divisors (20168714).

40217542 is a wasteful number, since it uses less digits than its factorization.

40217542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19982.

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 40217542 is about 6341.7302055512. The cubic root of 40217542 is about 342.6140547564.

Adding to 40217542 its reverse (24571204), we get a palindrome (64788746).

The spelling of 40217542 in words is "forty million, two hundred seventeen thousand, five hundred forty-two".