512432981 has 2 divisors, whose sum is σ = 512432982. Its totient is φ = 512432980.

The previous prime is 512432971. The next prime is 512433011. The reversal of 512432981 is 189234215.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 500640625 + 11792356 = 22375^2 + 3434^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-512432981 is a prime.

It is a super-2 number, since 2×512432981² = 525175120033092722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (512432941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256216490 + 256216491.

It is an arithmetic number, because the mean of its divisors is an integer number (256216491).

Almost surely, 2^512432981 is an apocalyptic number.

It is an amenable number.

512432981 is a deficient number, since it is larger than the sum of its proper divisors (1).

512432981 is an equidigital number, since it uses as much as digits as its factorization.

512432981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 35.

The square root of 512432981 is about 22636.9825948601. The cubic root of 512432981 is about 800.2254473984.

The spelling of 512432981 in words is "five hundred twelve million, four hundred thirty-two thousand, nine hundred eighty-one".