55520125 has 16 divisors (see below), whose sum is σ = 69501744. Its totient is φ = 44280000.

The previous prime is 55520107. The next prime is 55520149. The reversal of 55520125 is 52102555.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 27185796 + 28334329 = 5214^2 + 5323^2 .

It is not a de Polignac number, because 55520125 - 2¹¹ = 55518077 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55520125.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67215 + ... + 68035.

It is an arithmetic number, because the mean of its divisors is an integer number (4343859).

Almost surely, 2^55520125 is an apocalyptic number.

It is an amenable number.

55520125 is a deficient number, since it is larger than the sum of its proper divisors (13981619).

55520125 is an equidigital number, since it uses as much as digits as its factorization.

55520125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1377 (or 1367 counting only the distinct ones).

The product of its (nonzero) digits is 2500, while the sum is 25.

The square root of 55520125 is about 7451.1827920136. The cubic root of 55520125 is about 381.4902812113.

The spelling of 55520125 in words is "fifty-five million, five hundred twenty thousand, one hundred twenty-five".