55525540 has 48 divisors (see below), whose sum is σ = 133684992. Its totient is φ = 18976896.

The previous prime is 55525537. The next prime is 55525541. The reversal of 55525540 is 4552555.

It is not an unprimeable number, because it can be changed into a prime (55525541) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 85497 + ... + 86143.

It is an arithmetic number, because the mean of its divisors is an integer number (2785104).

Almost surely, 2^55525540 is an apocalyptic number.

It is an amenable number.

55525540 is an abundant number, since it is smaller than the sum of its proper divisors (78159452).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55525540 is a wasteful number, since it uses less digits than its factorization.

55525540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1276 (or 1274 counting only the distinct ones).

The product of its (nonzero) digits is 25000, while the sum is 31.

The square root of 55525540 is about 7451.5461482836. The cubic root of 55525540 is about 381.5026833371.

It can be divided in two parts, 55525 and 540, that added together give a palindrome (56065).

The spelling of 55525540 in words is "fifty-five million, five hundred twenty-five thousand, five hundred forty".