513211091 has 2 divisors, whose sum is σ = 513211092. Its totient is φ = 513211090.

The previous prime is 513211067. The next prime is 513211123. The reversal of 513211091 is 190112315.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-513211091 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (513211591) 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, 256605545 + 256605546.

It is an arithmetic number, because the mean of its divisors is an integer number (256605546).

Almost surely, 2^513211091 is an apocalyptic number.

513211091 is a deficient number, since it is larger than the sum of its proper divisors (1).

513211091 is an equidigital number, since it uses as much as digits as its factorization.

513211091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 270, while the sum is 23.

The square root of 513211091 is about 22654.1627742011. The cubic root of 513211091 is about 800.6302798662.

The spelling of 513211091 in words is "five hundred thirteen million, two hundred eleven thousand, ninety-one".