478522501 has 2 divisors, whose sum is σ = 478522502. Its totient is φ = 478522500.

The previous prime is 478522489. The next prime is 478522507. The reversal of 478522501 is 105225874.

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., 478471876 + 50625 = 21874^2 + 225^2 .

It is a cyclic number.

It is not a de Polignac number, because 478522501 - 2²¹ = 476425349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (478522507) 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, 239261250 + 239261251.

It is an arithmetic number, because the mean of its divisors is an integer number (239261251).

Almost surely, 2^478522501 is an apocalyptic number.

It is an amenable number.

478522501 is a deficient number, since it is larger than the sum of its proper divisors (1).

478522501 is an equidigital number, since it uses as much as digits as its factorization.

478522501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22400, while the sum is 34.

The square root of 478522501 is about 21875.1571651497. The cubic root of 478522501 is about 782.1693396179.

The spelling of 478522501 in words is "four hundred seventy-eight million, five hundred twenty-two thousand, five hundred one".