53640425 has 6 divisors (see below), whose sum is σ = 66514158. Its totient is φ = 42912320.

The previous prime is 53640421. The next prime is 53640427. The reversal of 53640425 is 52404635.

It can be written as a sum of positive squares in 3 ways, for example, as 9935104 + 43705321 = 3152^2 + 6611^2 .

It is not a de Polignac number, because 53640425 - 2² = 53640421 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53640421) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1072784 + ... + 1072833.

It is an arithmetic number, because the mean of its divisors is an integer number (11085693).

Almost surely, 2^53640425 is an apocalyptic number.

It is an amenable number.

53640425 is a deficient number, since it is larger than the sum of its proper divisors (12873733).

53640425 is a wasteful number, since it uses less digits than its factorization.

53640425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2145627 (or 2145622 counting only the distinct ones).

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

The square root of 53640425 is about 7323.9623838466. The cubic root of 53640425 is about 377.1354901418.

The spelling of 53640425 in words is "fifty-three million, six hundred forty thousand, four hundred twenty-five".