55125530 has 16 divisors (see below), whose sum is σ = 99894600. Its totient is φ = 21901632.

The previous prime is 55125487. The next prime is 55125547. The reversal of 55125530 is 3552155.

It can be written as a sum of positive squares in 4 ways, for example, as 40233649 + 14891881 = 6343^2 + 3859^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 55125530.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17009 + ... + 19988.

Almost surely, 2^55125530 is an apocalyptic number.

55125530 is a deficient number, since it is larger than the sum of its proper divisors (44769070).

55125530 is a wasteful number, since it uses less digits than its factorization.

55125530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37153.

The product of its (nonzero) digits is 3750, while the sum is 26.

The square root of 55125530 is about 7424.6568944295. The cubic root of 55125530 is about 380.5843502542.

Adding to 55125530 its reverse (3552155), we get a palindrome (58677685).

It can be divided in two parts, 55125 and 530, that added together give a palindrome (55655).

The spelling of 55125530 in words is "fifty-five million, one hundred twenty-five thousand, five hundred thirty".