4131579621 has 64 divisors (see below), whose sum is σ = 6446612480. Its totient is φ = 2331866880.

The previous prime is 4131579601. The next prime is 4131579679. The reversal of 4131579621 is 1269751314.

It is not a de Polignac number, because 4131579621 - 2¹⁰ = 4131578597 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4131579621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4131579601) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4046091 + ... + 4047111.

It is an arithmetic number, because the mean of its divisors is an integer number (100728320).

Almost surely, 2^4131579621 is an apocalyptic number.

It is an amenable number.

4131579621 is a deficient number, since it is larger than the sum of its proper divisors (2315032859).

4131579621 is a wasteful number, since it uses less digits than its factorization.

4131579621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1226.

The product of its digits is 45360, while the sum is 39.

The square root of 4131579621 is about 64277.3647639665. The cubic root of 4131579621 is about 1604.6194134530.

The spelling of 4131579621 in words is "four billion, one hundred thirty-one million, five hundred seventy-nine thousand, six hundred twenty-one".