2151382689 has 9 divisors (see below), whose sum is σ = 3107753779. Its totient is φ = 1434162360.

The previous prime is 2151382687. The next prime is 2151382693. The reversal of 2151382689 is 9862831512.

The square root of 2151382689 is 46383.

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

It can be written as a sum of positive squares in only one way, i.e., 442387089 + 1708995600 = 21033^2 + 41340^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 2151382689 - 2¹ = 2151382687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2151382687) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 131419 + ... + 146879.

Almost surely, 2^2151382689 is an apocalyptic number.

2151382689 is the 46383-rd square number.

2151382689 is the 23192-nd centered octagonal number.

It is an amenable number.

2151382689 is a deficient number, since it is larger than the sum of its proper divisors (956371090).

2151382689 is an frugal number, since it uses more digits than its factorization.

2151382689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30928 (or 15464 counting only the distinct ones).

The product of its digits is 207360, while the sum is 45.

The cubic root of 2151382689 is about 1290.9395012852.

The spelling of 2151382689 in words is "two billion, one hundred fifty-one million, three hundred eighty-two thousand, six hundred eighty-nine".