55310521 has 8 divisors (see below), whose sum is σ = 63296640. Its totient is φ = 47345568.

The previous prime is 55310509. The next prime is 55310527. The reversal of 55310521 is 12501355.

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 55310521 - 2⁷ = 55310393 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55310492 and 55310501.

It is not an unprimeable number, because it can be changed into a prime (55310527) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 780 + ... + 10546.

It is an arithmetic number, because the mean of its divisors is an integer number (7912080).

Almost surely, 2^55310521 is an apocalyptic number.

It is an amenable number.

55310521 is a deficient number, since it is larger than the sum of its proper divisors (7986119).

55310521 is an equidigital number, since it uses as much as digits as its factorization.

55310521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10583.

The product of its (nonzero) digits is 750, while the sum is 22.

The square root of 55310521 is about 7437.1043424171. The cubic root of 55310521 is about 381.0095982959.

Adding to 55310521 its reverse (12501355), we get a palindrome (67811876).

The spelling of 55310521 in words is "fifty-five million, three hundred ten thousand, five hundred twenty-one".