87052218261 has 4 divisors (see below), whose sum is σ = 116069624352. Its totient is φ = 58034812172.

The previous prime is 87052218247. The next prime is 87052218289. The reversal of 87052218261 is 16281225078.

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 87052218261 - 2⁵ = 87052218229 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87052218761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14508703041 + ... + 14508703046.

It is an arithmetic number, because the mean of its divisors is an integer number (29017406088).

Almost surely, 2^87052218261 is an apocalyptic number.

It is an amenable number.

87052218261 is a deficient number, since it is larger than the sum of its proper divisors (29017406091).

87052218261 is a wasteful number, since it uses less digits than its factorization.

87052218261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29017406090.

The product of its (nonzero) digits is 107520, while the sum is 42.

The spelling of 87052218261 in words is "eighty-seven billion, fifty-two million, two hundred eighteen thousand, two hundred sixty-one".