513223457 has 2 divisors, whose sum is σ = 513223458. Its totient is φ = 513223456.

The previous prime is 513223427. The next prime is 513223471. The reversal of 513223457 is 754322315.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 480091921 + 33131536 = 21911^2 + 5756^2 .

It is a cyclic number.

It is not a de Polignac number, because 513223457 - 2⁶ = 513223393 is a prime.

It is not a weakly prime, because it can be changed into another prime (513223427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256611728 + 256611729.

It is an arithmetic number, because the mean of its divisors is an integer number (256611729).

Almost surely, 2^513223457 is an apocalyptic number.

It is an amenable number.

513223457 is a deficient number, since it is larger than the sum of its proper divisors (1).

513223457 is an equidigital number, since it uses as much as digits as its factorization.

513223457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25200, while the sum is 32.

The square root of 513223457 is about 22654.4357025285. The cubic root of 513223457 is about 800.6367103030.

The spelling of 513223457 in words is "five hundred thirteen million, two hundred twenty-three thousand, four hundred fifty-seven".