55112521 has 8 divisors (see below), whose sum is σ = 61426080. Its totient is φ = 49140288.

The previous prime is 55112507. The next prime is 55112537. The reversal of 55112521 is 12521155.

It is a happy number.

55112521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55112521 - 2⁹ = 55112009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55112492 and 55112501.

It is not an unprimeable number, because it can be changed into a prime (55112221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84991 + ... + 85636.

It is an arithmetic number, because the mean of its divisors is an integer number (7678260).

Almost surely, 2^55112521 is an apocalyptic number.

It is an amenable number.

55112521 is a deficient number, since it is larger than the sum of its proper divisors (6313559).

55112521 is a wasteful number, since it uses less digits than its factorization.

55112521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170663.

The product of its digits is 500, while the sum is 22.

The square root of 55112521 is about 7423.7807753193. The cubic root of 55112521 is about 380.5544100352.

Adding to 55112521 its reverse (12521155), we get a palindrome (67633676).

The spelling of 55112521 in words is "fifty-five million, one hundred twelve thousand, five hundred twenty-one".