2138155512 has 16 divisors (see below), whose sum is σ = 5345388840. Its totient is φ = 712718496.

The previous prime is 2138155507. The next prime is 2138155531. The reversal of 2138155512 is 2155518312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44544883 + ... + 44544930.

Almost surely, 2^2138155512 is an apocalyptic number.

It is an amenable number.

2138155512 is an abundant number, since it is smaller than the sum of its proper divisors (3207233328).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2138155512 is a wasteful number, since it uses less digits than its factorization.

2138155512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89089822 (or 89089818 counting only the distinct ones).

The product of its digits is 12000, while the sum is 33.

The square root of 2138155512 is about 46240.1936847155. The cubic root of 2138155512 is about 1288.2884000483.

The spelling of 2138155512 in words is "two billion, one hundred thirty-eight million, one hundred fifty-five thousand, five hundred twelve".