55510005021 has 32 divisors (see below), whose sum is σ = 79249379328. Its totient is φ = 34438348800.

The previous prime is 55510004993. The next prime is 55510005043. The reversal of 55510005021 is 12050001555.

It is not a de Polignac number, because 55510005021 - 2¹⁴ = 55509988637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55510004982 and 55510005000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55510005121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5936676 + ... + 5946018.

It is an arithmetic number, because the mean of its divisors is an integer number (2476543104).

Almost surely, 2^55510005021 is an apocalyptic number.

55510005021 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

55510005021 is a deficient number, since it is larger than the sum of its proper divisors (23739374307).

55510005021 is a wasteful number, since it uses less digits than its factorization.

55510005021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10661.

The product of its (nonzero) digits is 1250, while the sum is 24.

Adding to 55510005021 its reverse (12050001555), we get a palindrome (67560006576).

The spelling of 55510005021 in words is "fifty-five billion, five hundred ten million, five thousand, twenty-one".