2152788381 has 16 divisors (see below), whose sum is σ = 3195993600. Its totient is φ = 1432187424.

The previous prime is 2152788377. The next prime is 2152788383. The reversal of 2152788381 is 1838872512.

It is not a de Polignac number, because 2152788381 - 2² = 2152788377 is a prime.

It is a super-2 number, since 2×2152788381² = 9268995626737202322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2152788383) 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, 70296 + ... + 96161.

It is an arithmetic number, because the mean of its divisors is an integer number (199749600).

Almost surely, 2^2152788381 is an apocalyptic number.

It is an amenable number.

2152788381 is a deficient number, since it is larger than the sum of its proper divisors (1043205219).

2152788381 is a wasteful number, since it uses less digits than its factorization.

2152788381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166945 (or 166939 counting only the distinct ones).

The product of its digits is 215040, while the sum is 45.

The square root of 2152788381 is about 46398.1506204719. The cubic root of 2152788381 is about 1291.2206024044.

The spelling of 2152788381 in words is "two billion, one hundred fifty-two million, seven hundred eighty-eight thousand, three hundred eighty-one".