53405625 has 80 divisors (see below), whose sum is σ = 109864832. Its totient is φ = 22464000.

The previous prime is 53405621. The next prime is 53405629. The reversal of 53405625 is 52650435.

It is an interprime number because it is at equal distance from previous prime (53405621) and next prime (53405629).

It is not a de Polignac number, because 53405625 - 2² = 53405621 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 53405592 and 53405601.

It is not an unprimeable number, because it can be changed into a prime (53405621) 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 79 ways as a sum of consecutive naturals, for example, 170469 + ... + 170781.

Almost surely, 2^53405625 is an apocalyptic number.

It is an amenable number.

53405625 is an abundant number, since it is smaller than the sum of its proper divisors (56459207).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

53405625 is a wasteful number, since it uses less digits than its factorization.

53405625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356 (or 341 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 30.

The square root of 53405625 is about 7307.9152293934. The cubic root of 53405625 is about 376.5844074248.

The spelling of 53405625 in words is "fifty-three million, four hundred five thousand, six hundred twenty-five".