42225525 has 18 divisors (see below), whose sum is σ = 75631010. Its totient is φ = 22520160.

The previous prime is 42225523. The next prime is 42225529. The reversal of 42225525 is 52552224.

42225525 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 1521 + 42224004 = 39^2 + 6498^2 .

It is not a de Polignac number, because 42225525 - 2¹ = 42225523 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42225523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 93610 + ... + 94059.

Almost surely, 2^42225525 is an apocalyptic number.

42225525 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

42225525 is a deficient number, since it is larger than the sum of its proper divisors (33405485).

42225525 is a wasteful number, since it uses less digits than its factorization.

42225525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187685 (or 187677 counting only the distinct ones).

The product of its digits is 8000, while the sum is 27.

The square root of 42225525 is about 6498.1170349571. The cubic root of 42225525 is about 348.2237215814.

Adding to 42225525 its reverse (52552224), we get a palindrome (94777749).

The spelling of 42225525 in words is "forty-two million, two hundred twenty-five thousand, five hundred twenty-five".