5995511521 has 4 divisors (see below), whose sum is σ = 6000164100. Its totient is φ = 5990858944.

The previous prime is 5995511519. The next prime is 5995511531. The reversal of 5995511521 is 1251155995.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3491509921 + 2504001600 = 59089^2 + 50040^2 .

It is a cyclic number.

It is not a de Polignac number, because 5995511521 - 2¹ = 5995511519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5995511531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2324356 + ... + 2326933.

It is an arithmetic number, because the mean of its divisors is an integer number (1500041025).

Almost surely, 2^5995511521 is an apocalyptic number.

It is an amenable number.

5995511521 is a deficient number, since it is larger than the sum of its proper divisors (4652579).

5995511521 is a wasteful number, since it uses less digits than its factorization.

5995511521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4652578.

The product of its digits is 101250, while the sum is 43.

The square root of 5995511521 is about 77430.6884962287. The cubic root of 5995511521 is about 1816.6673627058.

The spelling of 5995511521 in words is "five billion, nine hundred ninety-five million, five hundred eleven thousand, five hundred twenty-one".