506021501 has 2 divisors, whose sum is σ = 506021502. Its totient is φ = 506021500.

The previous prime is 506021449. The next prime is 506021513. The reversal of 506021501 is 105120605.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 333099001 + 172922500 = 18251^2 + 13150^2 .

It is a cyclic number.

It is not a de Polignac number, because 506021501 - 2⁶ = 506021437 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (506021561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 253010750 + 253010751.

It is an arithmetic number, because the mean of its divisors is an integer number (253010751).

Almost surely, 2^506021501 is an apocalyptic number.

It is an amenable number.

506021501 is a deficient number, since it is larger than the sum of its proper divisors (1).

506021501 is an equidigital number, since it uses as much as digits as its factorization.

506021501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 506021501 is about 22494.9216713462. The cubic root of 506021501 is about 796.8739994984.

The spelling of 506021501 in words is "five hundred six million, twenty-one thousand, five hundred one".