544480021 has 2 divisors, whose sum is σ = 544480022. Its totient is φ = 544480020.

The previous prime is 544480003. The next prime is 544480031. The reversal of 544480021 is 120084445.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 542377521 + 2102500 = 23289^2 + 1450^2 .

It is a cyclic number.

It is not a de Polignac number, because 544480021 - 2¹⁷ = 544348949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (544480031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272240010 + 272240011.

It is an arithmetic number, because the mean of its divisors is an integer number (272240011).

Almost surely, 2^544480021 is an apocalyptic number.

It is an amenable number.

544480021 is a deficient number, since it is larger than the sum of its proper divisors (1).

544480021 is an equidigital number, since it uses as much as digits as its factorization.

544480021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5120, while the sum is 28.

The square root of 544480021 is about 23334.0956756417. The cubic root of 544480021 is about 816.5710576582.

The spelling of 544480021 in words is "five hundred forty-four million, four hundred eighty thousand, twenty-one".