513888157 has 2 divisors, whose sum is σ = 513888158. Its totient is φ = 513888156.

The previous prime is 513888139. The next prime is 513888173. The reversal of 513888157 is 751888315.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 513520921 + 367236 = 22661^2 + 606^2 .

It is a cyclic number.

It is not a de Polignac number, because 513888157 - 2⁷ = 513888029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (513888107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256944078 + 256944079.

It is an arithmetic number, because the mean of its divisors is an integer number (256944079).

Almost surely, 2^513888157 is an apocalyptic number.

It is an amenable number.

513888157 is a deficient number, since it is larger than the sum of its proper divisors (1).

513888157 is an equidigital number, since it uses as much as digits as its factorization.

513888157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 268800, while the sum is 46.

The square root of 513888157 is about 22669.1013716909. The cubic root of 513888157 is about 800.9822086932.

The spelling of 513888157 in words is "five hundred thirteen million, eight hundred eighty-eight thousand, one hundred fifty-seven".