2152131749 has 4 divisors (see below), whose sum is σ = 2173026336. Its totient is φ = 2131237164.

The previous prime is 2152131721. The next prime is 2152131757. The reversal of 2152131749 is 9471312512.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2152131749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2152131049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10447139 + ... + 10447344.

It is an arithmetic number, because the mean of its divisors is an integer number (543256584).

Almost surely, 2^2152131749 is an apocalyptic number.

It is an amenable number.

2152131749 is a deficient number, since it is larger than the sum of its proper divisors (20894587).

2152131749 is a wasteful number, since it uses less digits than its factorization.

2152131749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20894586.

The product of its digits is 15120, while the sum is 35.

The square root of 2152131749 is about 46391.0740229195. The cubic root of 2152131749 is about 1291.0893086536.

The spelling of 2152131749 in words is "two billion, one hundred fifty-two million, one hundred thirty-one thousand, seven hundred forty-nine".