5261056821 has 12 divisors (see below), whose sum is σ = 7600009248. Its totient is φ = 3507045864.

The previous prime is 5261056817. The next prime is 5261056831. The reversal of 5261056821 is 1286501625.

5261056821 is a `hidden beast` number, since 526 + 1 + 0 + 56 + 82 + 1 = 666.

It is not a de Polignac number, because 5261056821 - 2² = 5261056817 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5261056811) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 113896 + ... + 153278.

It is an arithmetic number, because the mean of its divisors is an integer number (633334104).

Almost surely, 2^5261056821 is an apocalyptic number.

It is an amenable number.

5261056821 is a deficient number, since it is larger than the sum of its proper divisors (2338952427).

5261056821 is a wasteful number, since it uses less digits than its factorization.

5261056821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54232 (or 54229 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 5261056821 is about 72533.1429141189. The cubic root of 5261056821 is about 1739.2325876691.

The spelling of 5261056821 in words is "five billion, two hundred sixty-one million, fifty-six thousand, eight hundred twenty-one".