5211509823 has 12 divisors (see below), whose sum is σ = 8106793240. Its totient is φ = 3207082896.

The previous prime is 5211509801. The next prime is 5211509833. The reversal of 5211509823 is 3289051125.

5211509823 is a `hidden beast` number, since 521 + 1 + 50 + 9 + 82 + 3 = 666.

It is not a de Polignac number, because 5211509823 - 2⁶ = 5211509759 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5211509833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22271293 + ... + 22271526.

Almost surely, 2^5211509823 is an apocalyptic number.

5211509823 is a deficient number, since it is larger than the sum of its proper divisors (2895283417).

5211509823 is a wasteful number, since it uses less digits than its factorization.

5211509823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44542838 (or 44542835 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 5211509823 is about 72190.7876601994. The cubic root of 5211509823 is about 1733.7555070488.

The spelling of 5211509823 in words is "five billion, two hundred eleven million, five hundred nine thousand, eight hundred twenty-three".