2151565205 has 8 divisors (see below), whose sum is σ = 2591407104. Its totient is φ = 1714899600.

The previous prime is 2151565183. The next prime is 2151565211. The reversal of 2151565205 is 5025651512.

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

It is not a de Polignac number, because 2151565205 - 2¹⁴ = 2151548821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 792581 + ... + 795290.

It is an arithmetic number, because the mean of its divisors is an integer number (323925888).

Almost surely, 2^2151565205 is an apocalyptic number.

It is an amenable number.

2151565205 is a deficient number, since it is larger than the sum of its proper divisors (439841899).

2151565205 is a wasteful number, since it uses less digits than its factorization.

2151565205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1588147.

The product of its (nonzero) digits is 15000, while the sum is 32.

The square root of 2151565205 is about 46384.9674463613. The cubic root of 2151565205 is about 1290.9760065604.

The spelling of 2151565205 in words is "two billion, one hundred fifty-one million, five hundred sixty-five thousand, two hundred five".