55639425 has 12 divisors (see below), whose sum is σ = 91990640. Its totient is φ = 29674320.

The previous prime is 55639417. The next prime is 55639427. The reversal of 55639425 is 52493655.

55639425 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 55639425 - 2³ = 55639417 is a prime.

It is a super-2 number, since 2×55639425² = 6191491228661250, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (55639427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 370855 + ... + 371004.

Almost surely, 2^55639425 is an apocalyptic number.

It is an amenable number.

55639425 is a deficient number, since it is larger than the sum of its proper divisors (36351215).

55639425 is a wasteful number, since it uses less digits than its factorization.

55639425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 741872 (or 741867 counting only the distinct ones).

The product of its digits is 162000, while the sum is 39.

The square root of 55639425 is about 7459.1839365979. The cubic root of 55639425 is about 381.7633307364.

The spelling of 55639425 in words is "fifty-five million, six hundred thirty-nine thousand, four hundred twenty-five".