5731135921 has 16 divisors (see below), whose sum is σ = 6619106304. Its totient is φ = 4860624384.

The previous prime is 5731135873. The next prime is 5731135937. The reversal of 5731135921 is 1295311375.

It is not a de Polignac number, because 5731135921 - 2⁹ = 5731135409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5731136921) 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, 482176 + ... + 493918.

It is an arithmetic number, because the mean of its divisors is an integer number (413694144).

Almost surely, 2^5731135921 is an apocalyptic number.

It is an amenable number.

5731135921 is a deficient number, since it is larger than the sum of its proper divisors (887970383).

5731135921 is a wasteful number, since it uses less digits than its factorization.

5731135921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12480.

The product of its digits is 28350, while the sum is 37.

The square root of 5731135921 is about 75704.2662007895. The cubic root of 5731135921 is about 1789.5626326535.

The spelling of 5731135921 in words is "five billion, seven hundred thirty-one million, one hundred thirty-five thousand, nine hundred twenty-one".