513056891 has 2 divisors, whose sum is σ = 513056892. Its totient is φ = 513056890.

The previous prime is 513056881. The next prime is 513056897. The reversal of 513056891 is 198650315.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 513056891 - 2¹⁸ = 512794747 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (513056897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256528445 + 256528446.

It is an arithmetic number, because the mean of its divisors is an integer number (256528446).

Almost surely, 2^513056891 is an apocalyptic number.

513056891 is a deficient number, since it is larger than the sum of its proper divisors (1).

513056891 is an equidigital number, since it uses as much as digits as its factorization.

513056891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32400, while the sum is 38.

The square root of 513056891 is about 22650.7591705002. The cubic root of 513056891 is about 800.5500857329.

The spelling of 513056891 in words is "five hundred thirteen million, fifty-six thousand, eight hundred ninety-one".