478222501 has 2 divisors, whose sum is σ = 478222502. Its totient is φ = 478222500.

The previous prime is 478222439. The next prime is 478222607. The reversal of 478222501 is 105222874.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 368601601 + 109620900 = 19199^2 + 10470^2 .

It is a cyclic number.

It is not a de Polignac number, because 478222501 - 2¹¹ = 478220453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (478228501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239111250 + 239111251.

It is an arithmetic number, because the mean of its divisors is an integer number (239111251).

Almost surely, 2^478222501 is an apocalyptic number.

It is an amenable number.

478222501 is a deficient number, since it is larger than the sum of its proper divisors (1).

478222501 is an equidigital number, since it uses as much as digits as its factorization.

478222501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8960, while the sum is 31.

The square root of 478222501 is about 21868.2989964926. The cubic root of 478222501 is about 782.0058503671.

The spelling of 478222501 in words is "four hundred seventy-eight million, two hundred twenty-two thousand, five hundred one".