442210525 has 12 divisors (see below), whose sum is σ = 548602164. Its totient is φ = 353600000.

The previous prime is 442210499. The next prime is 442210529. The reversal of 442210525 is 525012244.

It can be written as a sum of positive squares in 6 ways, for example, as 27762361 + 414448164 = 5269^2 + 20358^2 .

It is not a de Polignac number, because 442210525 - 2²³ = 433821917 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

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 442210525.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442210529) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 97815 + ... + 102235.

It is an arithmetic number, because the mean of its divisors is an integer number (45716847).

Almost surely, 2^442210525 is an apocalyptic number.

It is an amenable number.

442210525 is a deficient number, since it is larger than the sum of its proper divisors (106391639).

442210525 is a wasteful number, since it uses less digits than its factorization.

442210525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8432 (or 8427 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 442210525 is about 21028.8022721219. The cubic root of 442210525 is about 761.8620804479.

Adding to 442210525 its reverse (525012244), we get a palindrome (967222769).

The spelling of 442210525 in words is "four hundred forty-two million, two hundred ten thousand, five hundred twenty-five".