5211556550 has 96 divisors (see below), whose sum is σ = 10842698880. Its totient is φ = 1852070400.

The previous prime is 5211556549. The next prime is 5211556579. The reversal of 5211556550 is 556551125.

It is a happy number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 5211556550.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7541705 + ... + 7542395.

It is an arithmetic number, because the mean of its divisors is an integer number (112944780).

Almost surely, 2^5211556550 is an apocalyptic number.

5211556550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

5211556550 is an abundant number, since it is smaller than the sum of its proper divisors (5631142330).

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

5211556550 is a wasteful number, since it uses less digits than its factorization.

5211556550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1206 (or 1201 counting only the distinct ones).

The product of its (nonzero) digits is 37500, while the sum is 35.

The square root of 5211556550 is about 72191.1112949510. Note that the first 3 decimals coincide. The cubic root of 5211556550 is about 1733.7606887174.

The spelling of 5211556550 in words is "five billion, two hundred eleven million, five hundred fifty-six thousand, five hundred fifty".