42505221515 has 16 divisors (see below), whose sum is σ = 51352947648. Its totient is φ = 33773241216.

The previous prime is 42505221491. The next prime is 42505221529. The reversal of 42505221515 is 51512250524.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 42505221515 - 2⁸ = 42505221259 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2080289 + ... + 2100621.

It is an arithmetic number, because the mean of its divisors is an integer number (3209559228).

Almost surely, 2^42505221515 is an apocalyptic number.

42505221515 is a deficient number, since it is larger than the sum of its proper divisors (8847726133).

42505221515 is a wasteful number, since it uses less digits than its factorization.

42505221515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23158.

The product of its (nonzero) digits is 20000, while the sum is 32.

The spelling of 42505221515 in words is "forty-two billion, five hundred five million, two hundred twenty-one thousand, five hundred fifteen".