2152519649 has 4 divisors (see below), whose sum is σ = 2460022464. Its totient is φ = 1845016836.

The previous prime is 2152519637. The next prime is 2152519657. The reversal of 2152519649 is 9469152512.

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-2152519649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2152519609) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153751397 + ... + 153751410.

It is an arithmetic number, because the mean of its divisors is an integer number (615005616).

Almost surely, 2^2152519649 is an apocalyptic number.

It is an amenable number.

2152519649 is a deficient number, since it is larger than the sum of its proper divisors (307502815).

2152519649 is an equidigital number, since it uses as much as digits as its factorization.

2152519649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307502814.

The product of its digits is 194400, while the sum is 44.

The square root of 2152519649 is about 46395.2545957019. The cubic root of 2152519649 is about 1291.1668725941.

The spelling of 2152519649 in words is "two billion, one hundred fifty-two million, five hundred nineteen thousand, six hundred forty-nine".