492557521 has 2 divisors, whose sum is σ = 492557522. Its totient is φ = 492557520.

The previous prime is 492557497. The next prime is 492557531. The reversal of 492557521 is 125755294.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 483340225 + 9217296 = 21985^2 + 3036^2 .

It is a cyclic number.

It is not a de Polignac number, because 492557521 - 2⁷ = 492557393 is a prime.

It is a super-2 number, since 2×492557521² = 485225822987330882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (492557531) 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, 246278760 + 246278761.

It is an arithmetic number, because the mean of its divisors is an integer number (246278761).

Almost surely, 2^492557521 is an apocalyptic number.

It is an amenable number.

492557521 is a deficient number, since it is larger than the sum of its proper divisors (1).

492557521 is an equidigital number, since it uses as much as digits as its factorization.

492557521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 126000, while the sum is 40.

The square root of 492557521 is about 22193.6369484589. The cubic root of 492557521 is about 789.7427571356.

The spelling of 492557521 in words is "four hundred ninety-two million, five hundred fifty-seven thousand, five hundred twenty-one".