506543551 has 6 divisors (see below), whose sum is σ = 524613752. Its totient is φ = 489075720.

The previous prime is 506543549. The next prime is 506543567. The reversal of 506543551 is 155345605.

It is not a de Polignac number, because 506543551 - 2¹ = 506543549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (506543501) 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 in 5 ways as a sum of consecutive naturals, for example, 300315 + ... + 301996.

Almost surely, 2^506543551 is an apocalyptic number.

506543551 is a deficient number, since it is larger than the sum of its proper divisors (18070201).

506543551 is an equidigital number, since it uses as much as digits as its factorization.

506543551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 602369 (or 602340 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 34.

The square root of 506543551 is about 22506.5224101815. The cubic root of 506543551 is about 797.1479437813.

The spelling of 506543551 in words is "five hundred six million, five hundred forty-three thousand, five hundred fifty-one".