4232721861 has 12 divisors (see below), whose sum is σ = 6173291488. Its totient is φ = 2794417704.

The previous prime is 4232721853. The next prime is 4232721869. The reversal of 4232721861 is 1681272324.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (4232721853) and next prime (4232721869).

It is not a de Polignac number, because 4232721861 - 2³ = 4232721853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4232721869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2282095 + ... + 2283948.

Almost surely, 2^4232721861 is an apocalyptic number.

It is an amenable number.

4232721861 is a deficient number, since it is larger than the sum of its proper divisors (1940569627).

4232721861 is a wasteful number, since it uses less digits than its factorization.

4232721861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4566152 (or 4566149 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 4232721861 is about 65059.3718152888. The cubic root of 4232721861 is about 1617.6078422667.

The spelling of 4232721861 in words is "four billion, two hundred thirty-two million, seven hundred twenty-one thousand, eight hundred sixty-one".