42155163225 has 72 divisors (see below), whose sum is σ = 89074632192. Its totient is φ = 18649267200.

The previous prime is 42155163223. The next prime is 42155163263. The reversal of 42155163225 is 52236155124.

42155163225 is a `hidden beast` number, since 4 + 2 + 15 + 5 + 1 + 632 + 2 + 5 = 666.

42155163225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 42155163225 - 2¹ = 42155163223 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42155163225.

It is not an unprimeable number, because it can be changed into a prime (42155163221) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 382872 + ... + 480521.

Almost surely, 2^42155163225 is an apocalyptic number.

42155163225 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

42155163225 is an abundant number, since it is smaller than the sum of its proper divisors (46919468967).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42155163225 is a wasteful number, since it uses less digits than its factorization.

42155163225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 863447 (or 863439 counting only the distinct ones).

The product of its digits is 72000, while the sum is 36.

The spelling of 42155163225 in words is "forty-two billion, one hundred fifty-five million, one hundred sixty-three thousand, two hundred twenty-five".