522403381 has 2 divisors, whose sum is σ = 522403382. Its totient is φ = 522403380.

The previous prime is 522403339. The next prime is 522403391. The reversal of 522403381 is 183304225.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 465264900 + 57138481 = 21570^2 + 7559^2 .

It is a cyclic number.

It is not a de Polignac number, because 522403381 - 2⁹ = 522402869 is a prime.

It is a super-2 number, since 2×522403381² = 545810584960462322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (522403391) 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 as a sum of consecutive naturals, namely, 261201690 + 261201691.

It is an arithmetic number, because the mean of its divisors is an integer number (261201691).

Almost surely, 2^522403381 is an apocalyptic number.

It is an amenable number.

522403381 is a deficient number, since it is larger than the sum of its proper divisors (1).

522403381 is an equidigital number, since it uses as much as digits as its factorization.

522403381 is an odious number, because the sum of its binary digits is odd.

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

The square root of 522403381 is about 22856.1453661811. The cubic root of 522403381 is about 805.3821371524.

The spelling of 522403381 in words is "five hundred twenty-two million, four hundred three thousand, three hundred eighty-one".