513644231 has 2 divisors, whose sum is σ = 513644232. Its totient is φ = 513644230.

The previous prime is 513644203. The next prime is 513644237. The reversal of 513644231 is 132446315.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 513644231 - 2¹⁴ = 513627847 is a prime.

It is a super-2 number, since 2×513644231² = 527660792079162722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 513644194 and 513644203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (513644237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256822115 + 256822116.

It is an arithmetic number, because the mean of its divisors is an integer number (256822116).

Almost surely, 2^513644231 is an apocalyptic number.

513644231 is a deficient number, since it is larger than the sum of its proper divisors (1).

513644231 is an equidigital number, since it uses as much as digits as its factorization.

513644231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 29.

The square root of 513644231 is about 22663.7205904062. The cubic root of 513644231 is about 800.8554552319.

The spelling of 513644231 in words is "five hundred thirteen million, six hundred forty-four thousand, two hundred thirty-one".