513226900891 has 2 divisors, whose sum is σ = 513226900892. Its totient is φ = 513226900890.

The previous prime is 513226900807. The next prime is 513226900897. The reversal of 513226900891 is 198009622315.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-513226900891 is a prime.

It is not a weakly prime, because it can be changed into another prime (513226900897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256613450445 + 256613450446.

It is an arithmetic number, because the mean of its divisors is an integer number (256613450446).

Almost surely, 2^513226900891 is an apocalyptic number.

513226900891 is a deficient number, since it is larger than the sum of its proper divisors (1).

513226900891 is an equidigital number, since it uses as much as digits as its factorization.

513226900891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 233280, while the sum is 46.

The spelling of 513226900891 in words is "five hundred thirteen billion, two hundred twenty-six million, nine hundred thousand, eight hundred ninety-one".