4531876721 has 8 divisors (see below), whose sum is σ = 4608604584. Its totient is φ = 4455227520.

The previous prime is 4531876703. The next prime is 4531876729. The reversal of 4531876721 is 1276781354.

It can be written as a sum of positive squares in 4 ways, for example, as 119596096 + 4412280625 = 10936^2 + 66425^2 .

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 4531876721 - 2¹⁴ = 4531860337 is a prime.

It is a super-2 number, since 2×4531876721² = 41075813228683423682, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4531876729) 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, 102935 + ... + 140211.

It is an arithmetic number, because the mean of its divisors is an integer number (576075573).

Almost surely, 2^4531876721 is an apocalyptic number.

It is an amenable number.

4531876721 is a deficient number, since it is larger than the sum of its proper divisors (76727863).

4531876721 is a wasteful number, since it uses less digits than its factorization.

4531876721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39331.

The product of its digits is 282240, while the sum is 44.

The square root of 4531876721 is about 67319.2150949489. The cubic root of 4531876721 is about 1654.8527746656.

The spelling of 4531876721 in words is "four billion, five hundred thirty-one million, eight hundred seventy-six thousand, seven hundred twenty-one".