512657381 has 2 divisors, whose sum is σ = 512657382. Its totient is φ = 512657380.

The previous prime is 512657377. The next prime is 512657407. The reversal of 512657381 is 183756215.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 344436481 + 168220900 = 18559^2 + 12970^2 .

It is a cyclic number.

It is not a de Polignac number, because 512657381 - 2² = 512657377 is a prime.

It is a super-2 number, since 2×512657381² = 525635180587558322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (512657371) 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, 256328690 + 256328691.

It is an arithmetic number, because the mean of its divisors is an integer number (256328691).

Almost surely, 2^512657381 is an apocalyptic number.

It is an amenable number.

512657381 is a deficient number, since it is larger than the sum of its proper divisors (1).

512657381 is an equidigital number, since it uses as much as digits as its factorization.

512657381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 50400, while the sum is 38.

The square root of 512657381 is about 22641.9385433315. The cubic root of 512657381 is about 800.3422395068.

The spelling of 512657381 in words is "five hundred twelve million, six hundred fifty-seven thousand, three hundred eighty-one".