2138509075 has 6 divisors (see below), whose sum is σ = 2651751284. Its totient is φ = 1710807240.

The previous prime is 2138509069. The next prime is 2138509099. The reversal of 2138509075 is 5709058312.

It is not a de Polignac number, because 2138509075 - 2⁹ = 2138508563 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 42770157 + ... + 42770206.

Almost surely, 2^2138509075 is an apocalyptic number.

2138509075 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2138509075 is a deficient number, since it is larger than the sum of its proper divisors (513242209).

2138509075 is an equidigital number, since it uses as much as digits as its factorization.

2138509075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85540373 (or 85540368 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 40.

The square root of 2138509075 is about 46244.0166399935. The cubic root of 2138509075 is about 1288.3594061102.

The spelling of 2138509075 in words is "two billion, one hundred thirty-eight million, five hundred nine thousand, seventy-five".