442513325 has 24 divisors (see below), whose sum is σ = 580900320. Its totient is φ = 333460800.

The previous prime is 442513289. The next prime is 442513327. The reversal of 442513325 is 523315244.

It is a happy number.

It is not a de Polignac number, because 442513325 - 2⁸ = 442513069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442513327) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 83402 + ... + 88548.

It is an arithmetic number, because the mean of its divisors is an integer number (24204180).

Almost surely, 2^442513325 is an apocalyptic number.

It is an amenable number.

442513325 is a deficient number, since it is larger than the sum of its proper divisors (138386995).

442513325 is a wasteful number, since it uses less digits than its factorization.

442513325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5357 (or 5352 counting only the distinct ones).

The product of its digits is 14400, while the sum is 29.

The square root of 442513325 is about 21036.0006892945. Note that the first 3 decimals coincide. The cubic root of 442513325 is about 762.0359336921.

Subtracting from 442513325 its sum of digits (29), we obtain a square (442513296 = 21036²).

Adding to 442513325 its reverse (523315244), we get a palindrome (965828569).

The spelling of 442513325 in words is "four hundred forty-two million, five hundred thirteen thousand, three hundred twenty-five".