538422421 has 2 divisors, whose sum is σ = 538422422. Its totient is φ = 538422420.

The previous prime is 538422407. The next prime is 538422449. The reversal of 538422421 is 124224835.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 523906321 + 14516100 = 22889^2 + 3810^2 .

It is a cyclic number.

It is not a de Polignac number, because 538422421 - 2¹¹ = 538420373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (538422121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 269211210 + 269211211.

It is an arithmetic number, because the mean of its divisors is an integer number (269211211).

Almost surely, 2^538422421 is an apocalyptic number.

It is an amenable number.

538422421 is a deficient number, since it is larger than the sum of its proper divisors (1).

538422421 is an equidigital number, since it uses as much as digits as its factorization.

538422421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15360, while the sum is 31.

The square root of 538422421 is about 23203.9311540092. The cubic root of 538422421 is about 813.5315099626.

The spelling of 538422421 in words is "five hundred thirty-eight million, four hundred twenty-two thousand, four hundred twenty-one".