513755551 has 2 divisors, whose sum is σ = 513755552. Its totient is φ = 513755550.

The previous prime is 513755549. The next prime is 513755647. The reversal of 513755551 is 155557315.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 513755551 - 2¹ = 513755549 is a prime.

It is a super-3 number, since 3×513755551³ (a number of 27 digits) contains 333 as substring.

Together with 513755549, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 513755551.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (513755251) 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, 256877775 + 256877776.

It is an arithmetic number, because the mean of its divisors is an integer number (256877776).

Almost surely, 2^513755551 is an apocalyptic number.

513755551 is a deficient number, since it is larger than the sum of its proper divisors (1).

513755551 is an equidigital number, since it uses as much as digits as its factorization.

513755551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 65625, while the sum is 37.

The square root of 513755551 is about 22666.1763647952. The cubic root of 513755551 is about 800.9133064216.

The spelling of 513755551 in words is "five hundred thirteen million, seven hundred fifty-five thousand, five hundred fifty-one".