53643825 has 18 divisors (see below), whose sum is σ = 96082454. Its totient is φ = 28609920.

The previous prime is 53643809. The next prime is 53643839. The reversal of 53643825 is 52834635.

It is a happy number.

53643825 is a `hidden beast` number, since 5 + 3 + 643 + 8 + 2 + 5 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 11029041 + 42614784 = 3321^2 + 6528^2 .

It is not a de Polignac number, because 53643825 - 2⁴ = 53643809 is a prime.

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 53643825.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 118984 + ... + 119433.

Almost surely, 2^53643825 is an apocalyptic number.

It is an amenable number.

53643825 is a deficient number, since it is larger than the sum of its proper divisors (42438629).

53643825 is a wasteful number, since it uses less digits than its factorization.

53643825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238433 (or 238425 counting only the distinct ones).

The product of its digits is 86400, while the sum is 36.

The square root of 53643825 is about 7324.1944949598. The cubic root of 53643825 is about 377.1434582217.

The spelling of 53643825 in words is "fifty-three million, six hundred forty-three thousand, eight hundred twenty-five".