2152129565 has 16 divisors (see below), whose sum is σ = 2655903600. Its totient is φ = 1673134080.

The previous prime is 2152129543. The next prime is 2152129583. The reversal of 2152129565 is 5659212512.

It can be written as a sum of positive squares in 8 ways, for example, as 10106041 + 2142023524 = 3179^2 + 46282^2 .

It is not a de Polignac number, because 2152129565 - 2²⁰ = 2151080989 is a prime.

It is a super-4 number, since 4×2152129565⁴ (a number of 38 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32261 + ... + 73109.

It is an arithmetic number, because the mean of its divisors is an integer number (165993975).

Almost surely, 2^2152129565 is an apocalyptic number.

It is an amenable number.

2152129565 is a deficient number, since it is larger than the sum of its proper divisors (503774035).

2152129565 is a wasteful number, since it uses less digits than its factorization.

2152129565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41152.

The product of its digits is 54000, while the sum is 38.

The square root of 2152129565 is about 46391.0504839026. The cubic root of 2152129565 is about 1291.0888719176.

The spelling of 2152129565 in words is "two billion, one hundred fifty-two million, one hundred twenty-nine thousand, five hundred sixty-five".