2587122161 has 8 divisors (see below), whose sum is σ = 2882205480. Its totient is φ = 2305763712.

The previous prime is 2587122157. The next prime is 2587122193. The reversal of 2587122161 is 1612217852.

2587122161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 417425761 + 2169696400 = 20431^2 + 46580^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2587122161 - 2² = 2587122157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2587122151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3430820 + ... + 3431573.

It is an arithmetic number, because the mean of its divisors is an integer number (360275685).

Almost surely, 2^2587122161 is an apocalyptic number.

It is an amenable number.

2587122161 is a deficient number, since it is larger than the sum of its proper divisors (295083319).

2587122161 is a wasteful number, since it uses less digits than its factorization.

2587122161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6862435.

The product of its digits is 13440, while the sum is 35.

The square root of 2587122161 is about 50863.7607830959. The cubic root of 2587122161 is about 1372.7948629645.

The spelling of 2587122161 in words is "two billion, five hundred eighty-seven million, one hundred twenty-two thousand, one hundred sixty-one".