512411981 has 2 divisors, whose sum is σ = 512411982. Its totient is φ = 512411980.

The previous prime is 512411971. The next prime is 512411983. The reversal of 512411981 is 189114215.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 337273225 + 175138756 = 18365^2 + 13234^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-512411981 is a prime.

It is a super-2 number, since 2×512411981² = 525132076544688722, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 512411983, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (512411983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256205990 + 256205991.

It is an arithmetic number, because the mean of its divisors is an integer number (256205991).

Almost surely, 2^512411981 is an apocalyptic number.

It is an amenable number.

512411981 is a deficient number, since it is larger than the sum of its proper divisors (1).

512411981 is an equidigital number, since it uses as much as digits as its factorization.

512411981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2880, while the sum is 32.

The square root of 512411981 is about 22636.5187473693. The cubic root of 512411981 is about 800.2145159110.

The spelling of 512411981 in words is "five hundred twelve million, four hundred eleven thousand, nine hundred eighty-one".