42181315 has 16 divisors (see below), whose sum is σ = 55376640. Its totient is φ = 30589920.

The previous prime is 42181309. The next prime is 42181331. The reversal of 42181315 is 51318124.

It is a de Polignac number, because none of the positive numbers 2^k-42181315 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42181315.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23272 + ... + 25018.

It is an arithmetic number, because the mean of its divisors is an integer number (3461040).

Almost surely, 2^42181315 is an apocalyptic number.

42181315 is a deficient number, since it is larger than the sum of its proper divisors (13195325).

42181315 is a wasteful number, since it uses less digits than its factorization.

42181315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2202.

The product of its digits is 960, while the sum is 25.

The square root of 42181315 is about 6494.7143894093. The cubic root of 42181315 is about 348.1021494069.

Adding to 42181315 its reverse (51318124), we get a palindrome (93499439).

The spelling of 42181315 in words is "forty-two million, one hundred eighty-one thousand, three hundred fifteen".