5212870821 has 6 divisors (see below), whose sum is σ = 7529702310. Its totient is φ = 3475247208.

The previous prime is 5212870801. The next prime is 5212870823. The reversal of 5212870821 is 1280782125.

It can be written as a sum of positive squares in only one way, i.e., 4779648225 + 433222596 = 69135^2 + 20814^2 .

It is not a de Polignac number, because 5212870821 - 2⁹ = 5212870309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5212870823) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 289603926 + ... + 289603943.

It is an arithmetic number, because the mean of its divisors is an integer number (1254950385).

Almost surely, 2^5212870821 is an apocalyptic number.

It is an amenable number.

5212870821 is a deficient number, since it is larger than the sum of its proper divisors (2316831489).

5212870821 is a wasteful number, since it uses less digits than its factorization.

5212870821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 579207875 (or 579207872 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 36.

The square root of 5212870821 is about 72200.2134415128. The cubic root of 5212870821 is about 1733.9064186834.

The spelling of 5212870821 in words is "five billion, two hundred twelve million, eight hundred seventy thousand, eight hundred twenty-one".