42225512561 has 4 divisors (see below), whose sum is σ = 42760012800. Its totient is φ = 41691012324.

The previous prime is 42225512551. The next prime is 42225512629. The reversal of 42225512561 is 16521552224.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42225512561 is a prime.

It is a super-2 number, since 2×42225512561² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42225512531) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 267250001 + ... + 267250158.

It is an arithmetic number, because the mean of its divisors is an integer number (10690003200).

Almost surely, 2^42225512561 is an apocalyptic number.

It is an amenable number.

42225512561 is a deficient number, since it is larger than the sum of its proper divisors (534500239).

42225512561 is an equidigital number, since it uses as much as digits as its factorization.

42225512561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 534500238.

The product of its digits is 48000, while the sum is 35.

The spelling of 42225512561 in words is "forty-two billion, two hundred twenty-five million, five hundred twelve thousand, five hundred sixty-one".