42515111 has 4 divisors (see below), whose sum is σ = 42590400. Its totient is φ = 42439824.

The previous prime is 42515101. The next prime is 42515117. The reversal of 42515111 is 11151524.

42515111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 42515111 - 2¹⁸ = 42252967 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 (42515117) 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 3 ways as a sum of consecutive naturals, for example, 36791 + ... + 37928.

It is an arithmetic number, because the mean of its divisors is an integer number (10647600).

Almost surely, 2^42515111 is an apocalyptic number.

42515111 is a deficient number, since it is larger than the sum of its proper divisors (75289).

42515111 is an equidigital number, since it uses as much as digits as its factorization.

42515111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75288.

The product of its digits is 200, while the sum is 20.

The square root of 42515111 is about 6520.3612629976. The cubic root of 42515111 is about 349.0179573303.

Adding to 42515111 its reverse (11151524), we get a palindrome (53666635).

The spelling of 42515111 in words is "forty-two million, five hundred fifteen thousand, one hundred eleven".