442415225 has 24 divisors (see below), whose sum is σ = 663850368. Its totient is φ = 285523200.

The previous prime is 442415219. The next prime is 442415269. The reversal of 442415225 is 522514244.

It is not a de Polignac number, because 442415225 - 2⁶ = 442415161 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 23 ways as a sum of consecutive naturals, for example, 71381 + ... + 77330.

It is an arithmetic number, because the mean of its divisors is an integer number (27660432).

Almost surely, 2^442415225 is an apocalyptic number.

It is an amenable number.

442415225 is a deficient number, since it is larger than the sum of its proper divisors (221435143).

442415225 is a wasteful number, since it uses less digits than its factorization.

442415225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148745 (or 148740 counting only the distinct ones).

The product of its digits is 12800, while the sum is 29.

The square root of 442415225 is about 21033.6688430716. The cubic root of 442415225 is about 761.9796180622.

Adding to 442415225 its reverse (522514244), we get a palindrome (964929469).

The spelling of 442415225 in words is "four hundred forty-two million, four hundred fifteen thousand, two hundred twenty-five".