501563401 has 2 divisors, whose sum is σ = 501563402. Its totient is φ = 501563400.

The previous prime is 501563389. The next prime is 501563417. The reversal of 501563401 is 104365105.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 458987776 + 42575625 = 21424^2 + 6525^2 .

It is a cyclic number.

It is not a de Polignac number, because 501563401 - 2¹³ = 501555209 is a prime.

It is not a weakly prime, because it can be changed into another prime (501563471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250781700 + 250781701.

It is an arithmetic number, because the mean of its divisors is an integer number (250781701).

Almost surely, 2^501563401 is an apocalyptic number.

It is an amenable number.

501563401 is a deficient number, since it is larger than the sum of its proper divisors (1).

501563401 is an equidigital number, since it uses as much as digits as its factorization.

501563401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 501563401 is about 22395.6111995185. The cubic root of 501563401 is about 794.5269133957.

The spelling of 501563401 in words is "five hundred one million, five hundred sixty-three thousand, four hundred one".