2138391325 has 48 divisors (see below), whose sum is σ = 3217294080. Its totient is φ = 1376363520.

The previous prime is 2138391323. The next prime is 2138391349. The reversal of 2138391325 is 5231938312.

It is not a de Polignac number, because 2138391325 - 2¹ = 2138391323 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2138391323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1495711 + ... + 1497139.

It is an arithmetic number, because the mean of its divisors is an integer number (67026960).

Almost surely, 2^2138391325 is an apocalyptic number.

2138391325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2138391325 is a deficient number, since it is larger than the sum of its proper divisors (1078902755).

2138391325 is a wasteful number, since it uses less digits than its factorization.

2138391325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1966 (or 1961 counting only the distinct ones).

The product of its digits is 38880, while the sum is 37.

The square root of 2138391325 is about 46242.7434847890. The cubic root of 2138391325 is about 1288.3357592454.

The spelling of 2138391325 in words is "two billion, one hundred thirty-eight million, three hundred ninety-one thousand, three hundred twenty-five".