42565031255225 has 12 divisors (see below), whose sum is σ = 53104446361296. Its totient is φ = 33843116872080.

The previous prime is 42565031255221. The next prime is 42565031255237. The reversal of 42565031255225 is 52255213056524.

It is a happy number.

It is not a de Polignac number, because 42565031255225 - 2² = 42565031255221 is a prime.

It is a super-3 number, since 3×42565031255225³ (a number of 42 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42565031255225.

It is not an unprimeable number, because it can be changed into a prime (42565031255221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5222699147 + ... + 5222707296.

It is an arithmetic number, because the mean of its divisors is an integer number (4425370530108).

Almost surely, 2^{42565031255225} is an apocalyptic number.

It is an amenable number.

42565031255225 is a deficient number, since it is larger than the sum of its proper divisors (10539415106071).

42565031255225 is a wasteful number, since it uses less digits than its factorization.

42565031255225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10445406616 (or 10445406611 counting only the distinct ones).

The product of its (nonzero) digits is 3600000, while the sum is 47.

The spelling of 42565031255225 in words is "forty-two trillion, five hundred sixty-five billion, thirty-one million, two hundred fifty-five thousand, two hundred twenty-five".