2152671891 has 16 divisors (see below), whose sum is σ = 2939988480. Its totient is φ = 1400303520.

The previous prime is 2152671889. The next prime is 2152671931. The reversal of 2152671891 is 1981762512.

It is not a de Polignac number, because 2152671891 - 2¹ = 2152671889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2152671091) 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 15 ways as a sum of consecutive naturals, for example, 126001 + ... + 142061.

It is an arithmetic number, because the mean of its divisors is an integer number (183749280).

Almost surely, 2^2152671891 is an apocalyptic number.

2152671891 is a deficient number, since it is larger than the sum of its proper divisors (787316589).

2152671891 is a wasteful number, since it uses less digits than its factorization.

2152671891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17146.

The product of its digits is 60480, while the sum is 42.

The square root of 2152671891 is about 46396.8952732831. The cubic root of 2152671891 is about 1291.1973121448.

The spelling of 2152671891 in words is "two billion, one hundred fifty-two million, six hundred seventy-one thousand, eight hundred ninety-one".