2125516538 has 8 divisors (see below), whose sum is σ = 3188524500. Its totient is φ = 1062675040.

The previous prime is 2125516507. The next prime is 2125516571. The reversal of 2125516538 is 8356155212.

It can be written as a sum of positive squares in 2 ways, for example, as 2125486609 + 29929 = 46103^2 + 173^2 .

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

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, 2243 + ... + 65238.

Almost surely, 2^2125516538 is an apocalyptic number.

2125516538 is a deficient number, since it is larger than the sum of its proper divisors (1063007962).

2125516538 is a wasteful number, since it uses less digits than its factorization.

2125516538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83232.

The product of its digits is 72000, while the sum is 38.

The square root of 2125516538 is about 46103.3245872790. The cubic root of 2125516538 is about 1285.7449566663.

The spelling of 2125516538 in words is "two billion, one hundred twenty-five million, five hundred sixteen thousand, five hundred thirty-eight".