2138915375 has 16 divisors (see below), whose sum is σ = 2671930560. Its totient is φ = 1709488800.

The previous prime is 2138915353. The next prime is 2138915411. The reversal of 2138915375 is 5735198312.

It is not a de Polignac number, because 2138915375 - 2²⁶ = 2071806511 is a prime.

It is a super-2 number, since 2×2138915375² = 9149917962822781250, which contains 22 as substring.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 131966 + ... + 147284.

It is an arithmetic number, because the mean of its divisors is an integer number (166995660).

Almost surely, 2^2138915375 is an apocalyptic number.

2138915375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2138915375 is a deficient number, since it is larger than the sum of its proper divisors (533015185).

2138915375 is a wasteful number, since it uses less digits than its factorization.

2138915375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16451 (or 16441 counting only the distinct ones).

The product of its digits is 226800, while the sum is 44.

The square root of 2138915375 is about 46248.4094321091. The cubic root of 2138915375 is about 1288.4409936806.

The spelling of 2138915375 in words is "two billion, one hundred thirty-eight million, nine hundred fifteen thousand, three hundred seventy-five".