2138908135 has 32 divisors (see below), whose sum is σ = 3163628160. Its totient is φ = 1351876608.

The previous prime is 2138908127. The next prime is 2138908151. The reversal of 2138908135 is 5318098312.

It is a cyclic number.

It is not a de Polignac number, because 2138908135 - 2³ = 2138908127 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 346839 + ... + 352951.

It is an arithmetic number, because the mean of its divisors is an integer number (98863380).

Almost surely, 2^2138908135 is an apocalyptic number.

2138908135 is a deficient number, since it is larger than the sum of its proper divisors (1024720025).

2138908135 is a wasteful number, since it uses less digits than its factorization.

2138908135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6907.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 2138908135 is about 46248.3311590808. The cubic root of 2138908135 is about 1288.4395399339.

The spelling of 2138908135 in words is "two billion, one hundred thirty-eight million, nine hundred eight thousand, one hundred thirty-five".