5643112521 has 8 divisors (see below), whose sum is σ = 7524901440. Its totient is φ = 3761699312.

The previous prime is 5643112493. The next prime is 5643112561. The reversal of 5643112521 is 1252113465.

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

It is a cyclic number.

It is not a de Polignac number, because 5643112521 - 2²² = 5638918217 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5643112561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56781 + ... + 120458.

It is an arithmetic number, because the mean of its divisors is an integer number (940612680).

Almost surely, 2^5643112521 is an apocalyptic number.

It is an amenable number.

5643112521 is a deficient number, since it is larger than the sum of its proper divisors (1881788919).

5643112521 is a wasteful number, since it uses less digits than its factorization.

5643112521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187855.

The product of its digits is 7200, while the sum is 30.

The square root of 5643112521 is about 75120.6530922089. The cubic root of 5643112521 is about 1780.3534753346.

Adding to 5643112521 its reverse (1252113465), we get a palindrome (6895225986).

The spelling of 5643112521 in words is "five billion, six hundred forty-three million, one hundred twelve thousand, five hundred twenty-one".