506402551 has 2 divisors, whose sum is σ = 506402552. Its totient is φ = 506402550.

The previous prime is 506402543. The next prime is 506402557. The reversal of 506402551 is 155204605.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 506402551 - 2³ = 506402543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (506402557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 253201275 + 253201276.

It is an arithmetic number, because the mean of its divisors is an integer number (253201276).

Almost surely, 2^506402551 is an apocalyptic number.

506402551 is a deficient number, since it is larger than the sum of its proper divisors (1).

506402551 is an equidigital number, since it uses as much as digits as its factorization.

506402551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 506402551 is about 22503.3897668773. The cubic root of 506402551 is about 797.0739729842.

The spelling of 506402551 in words is "five hundred six million, four hundred two thousand, five hundred fifty-one".