53665425 has 36 divisors (see below), whose sum is σ = 104863824. Its totient is φ = 26018400.

The previous prime is 53665373. The next prime is 53665427. The reversal of 53665425 is 52456635.

It is a happy number.

53665425 is a `hidden beast` number, since 53 + 66 + 542 + 5 = 666.

It is not a de Polignac number, because 53665425 - 2⁹ = 53664913 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 53665425.

It is not an unprimeable number, because it can be changed into a prime (53665427) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 8367 + ... + 13316.

It is an arithmetic number, because the mean of its divisors is an integer number (2912884).

Almost surely, 2^53665425 is an apocalyptic number.

53665425 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

53665425 is a deficient number, since it is larger than the sum of its proper divisors (51198399).

53665425 is a wasteful number, since it uses less digits than its factorization.

53665425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21710 (or 21702 counting only the distinct ones).

The product of its digits is 108000, while the sum is 36.

The square root of 53665425 is about 7325.6689114374. The cubic root of 53665425 is about 377.1940711025.

The spelling of 53665425 in words is "fifty-three million, six hundred sixty-five thousand, four hundred twenty-five".