2126521538 has 8 divisors (see below), whose sum is σ = 3196333632. Its totient is φ = 1061076996.

The previous prime is 2126521499. The next prime is 2126521547. The reversal of 2126521538 is 8351256212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 2126521498 and 2126521507.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1090670 + ... + 1092617.

It is an arithmetic number, because the mean of its divisors is an integer number (399541704).

Almost surely, 2^2126521538 is an apocalyptic number.

2126521538 is a deficient number, since it is larger than the sum of its proper divisors (1069812094).

2126521538 is a wasteful number, since it uses less digits than its factorization.

2126521538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2183776.

The product of its digits is 28800, while the sum is 35.

The square root of 2126521538 is about 46114.2227300862. Note that the first 3 decimals coincide. The cubic root of 2126521538 is about 1285.9475693888.

The spelling of 2126521538 in words is "two billion, one hundred twenty-six million, five hundred twenty-one thousand, five hundred thirty-eight".