5211211521 has 32 divisors (see below), whose sum is σ = 7330176000. Its totient is φ = 3288262208.

The previous prime is 5211211519. The next prime is 5211211531. The reversal of 5211211521 is 1251121125.

It is not a de Polignac number, because 5211211521 - 2¹ = 5211211519 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5211211531) 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, 2149516 + ... + 2151938.

It is an arithmetic number, because the mean of its divisors is an integer number (229068000).

Almost surely, 2^5211211521 is an apocalyptic number.

It is an amenable number.

5211211521 is a deficient number, since it is larger than the sum of its proper divisors (2118964479).

5211211521 is a wasteful number, since it uses less digits than its factorization.

5211211521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2933.

The product of its digits is 200, while the sum is 21.

The square root of 5211211521 is about 72188.7215636903. The cubic root of 5211211521 is about 1733.7224268973.

Adding to 5211211521 its reverse (1251121125), we get a palindrome (6462332646).

The spelling of 5211211521 in words is "five billion, two hundred eleven million, two hundred eleven thousand, five hundred twenty-one".