859542223225 has 27 divisors (see below), whose sum is σ = 1239892610637. Its totient is φ = 589378130880.

The previous prime is 859542223213. The next prime is 859542223231. The reversal of 859542223225 is 522322245958.

The square root of 859542223225 is 927115.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 147293996521 + 712248226704 = 383789^2 + 843948^2 .

It is not a de Polignac number, because 859542223225 - 2⁵ = 859542223193 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is an unprimeable number.

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 26 ways as a sum of consecutive naturals, for example, 32435781 + ... + 32462269.

Almost surely, 2^859542223225 is an apocalyptic number.

859542223225 is the 927115-th square number.

859542223225 is the 463558-th centered octagonal number.

It is an amenable number.

859542223225 is a deficient number, since it is larger than the sum of its proper divisors (380350387412).

859542223225 is an frugal number, since it uses more digits than its factorization.

859542223225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53002 (or 26501 counting only the distinct ones).

The product of its digits is 3456000, while the sum is 49.

Multiplying 859542223225 by its sum of digits (49), we get a square (42117568938025 = 6489805²).

859542223225 divided by its sum of digits (49) gives a square (17541678025 = 132445²).

The spelling of 859542223225 in words is "eight hundred fifty-nine billion, five hundred forty-two million, two hundred twenty-three thousand, two hundred twenty-five".