55819825 has 6 divisors (see below), whose sum is σ = 69216614. Its totient is φ = 44655840.

The previous prime is 55819811. The next prime is 55819831. The reversal of 55819825 is 52891855.

It can be written as a sum of positive squares in 3 ways, for example, as 7711729 + 48108096 = 2777^2 + 6936^2 .

It is not a de Polignac number, because 55819825 - 2²¹ = 53722673 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1116372 + ... + 1116421.

Almost surely, 2^55819825 is an apocalyptic number.

It is an amenable number.

55819825 is a deficient number, since it is larger than the sum of its proper divisors (13396789).

55819825 is a wasteful number, since it uses less digits than its factorization.

55819825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2232803 (or 2232798 counting only the distinct ones).

The product of its digits is 144000, while the sum is 43.

The square root of 55819825 is about 7471.2666262154. The cubic root of 55819825 is about 382.1754833662.

It can be divided in two parts, 55819 and 825, that added together give a square (56644 = 238²).

The spelling of 55819825 in words is "fifty-five million, eight hundred nineteen thousand, eight hundred twenty-five".