5218756261 has 4 divisors (see below), whose sum is σ = 5267529792. Its totient is φ = 5169982732.

The previous prime is 5218756243. The next prime is 5218756273. The reversal of 5218756261 is 1626578125.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 5218756261 - 2⁵ = 5218756229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5218756561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24386605 + ... + 24386818.

It is an arithmetic number, because the mean of its divisors is an integer number (1316882448).

Almost surely, 2^5218756261 is an apocalyptic number.

It is an amenable number.

5218756261 is a deficient number, since it is larger than the sum of its proper divisors (48773531).

5218756261 is a wasteful number, since it uses less digits than its factorization.

5218756261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48773530.

The product of its digits is 201600, while the sum is 43.

The square root of 5218756261 is about 72240.9597181544. The cubic root of 5218756261 is about 1734.5587121107.

The spelling of 5218756261 in words is "five billion, two hundred eighteen million, seven hundred fifty-six thousand, two hundred sixty-one".