3138799521 has 16 divisors (see below), whose sum is σ = 4916721600. Its totient is φ = 1755971520.

The previous prime is 3138799519. The next prime is 3138799529. The reversal of 3138799521 is 1259978313.

3138799521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3138799521 - 2¹ = 3138799519 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3138799529) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3657846 + ... + 3658703.

It is an arithmetic number, because the mean of its divisors is an integer number (307295100).

Almost surely, 2^3138799521 is an apocalyptic number.

It is an amenable number.

3138799521 is a deficient number, since it is larger than the sum of its proper divisors (1777922079).

3138799521 is a wasteful number, since it uses less digits than its factorization.

3138799521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7316576.

The product of its digits is 408240, while the sum is 48.

The square root of 3138799521 is about 56024.9901472548. The cubic root of 3138799521 is about 1464.1577115735.

The spelling of 3138799521 in words is "three billion, one hundred thirty-eight million, seven hundred ninety-nine thousand, five hundred twenty-one".