55408025 has 6 divisors (see below), whose sum is σ = 68705982. Its totient is φ = 44326400.

The previous prime is 55408007. The next prime is 55408027. The reversal of 55408025 is 52080455.

It can be written as a sum of positive squares in 3 ways, for example, as 14409616 + 40998409 = 3796^2 + 6403^2 .

It is a de Polignac number, because none of the positive numbers 2^k-55408025 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55408027) 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, 1108136 + ... + 1108185.

It is an arithmetic number, because the mean of its divisors is an integer number (11450997).

Almost surely, 2^55408025 is an apocalyptic number.

It is an amenable number.

55408025 is a deficient number, since it is larger than the sum of its proper divisors (13297957).

55408025 is a wasteful number, since it uses less digits than its factorization.

55408025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2216331 (or 2216326 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 29.

The square root of 55408025 is about 7443.6566954690. The cubic root of 55408025 is about 381.2333541062.

The spelling of 55408025 in words is "fifty-five million, four hundred eight thousand, twenty-five".