42116615 has 4 divisors (see below), whose sum is σ = 50539944. Its totient is φ = 33693288.

The previous prime is 42116593. The next prime is 42116617. The reversal of 42116615 is 51661124.

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 42116615 - 2⁸ = 42116359 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 (42116617) 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, 4211657 + ... + 4211666.

It is an arithmetic number, because the mean of its divisors is an integer number (12634986).

Almost surely, 2^42116615 is an apocalyptic number.

42116615 is a deficient number, since it is larger than the sum of its proper divisors (8423329).

42116615 is an equidigital number, since it uses as much as digits as its factorization.

42116615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8423328.

The product of its digits is 1440, while the sum is 26.

The square root of 42116615 is about 6489.7315044615. The cubic root of 42116615 is about 347.9240789812.

Adding to 42116615 its reverse (51661124), we get a palindrome (93777739).

The spelling of 42116615 in words is "forty-two million, one hundred sixteen thousand, six hundred fifteen".