4561432021 has 2 divisors, whose sum is σ = 4561432022. Its totient is φ = 4561432020.

The previous prime is 4561432003. The next prime is 4561432037. The reversal of 4561432021 is 1202341654.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3832971921 + 728460100 = 61911^2 + 26990^2 .

It is a cyclic number.

It is not a de Polignac number, because 4561432021 - 2⁷ = 4561431893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4561432921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2280716010 + 2280716011.

It is an arithmetic number, because the mean of its divisors is an integer number (2280716011).

Almost surely, 2^4561432021 is an apocalyptic number.

It is an amenable number.

4561432021 is a deficient number, since it is larger than the sum of its proper divisors (1).

4561432021 is an equidigital number, since it uses as much as digits as its factorization.

4561432021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 4561432021 is about 67538.3744326142. The cubic root of 4561432021 is about 1658.4424376174.

Adding to 4561432021 its reverse (1202341654), we get a palindrome (5763773675).

The spelling of 4561432021 in words is "four billion, five hundred sixty-one million, four hundred thirty-two thousand, twenty-one".