512550981 has 12 divisors (see below), whose sum is σ = 740558208. Its totient is φ = 341605224.

The previous prime is 512550971. The next prime is 512550991. The reversal of 512550981 is 189055215.

It is a happy number.

512550981 is a `hidden beast` number, since 5 + 12 + 550 + 98 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (512550971) and next prime (512550991).

It is not a de Polignac number, because 512550981 - 2¹⁰ = 512549957 is a prime.

It is a super-2 number, since 2×512550981² = 525417016248124722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (512550971) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43756 + ... + 54218.

It is an arithmetic number, because the mean of its divisors is an integer number (61713184).

Almost surely, 2^512550981 is an apocalyptic number.

It is an amenable number.

512550981 is a deficient number, since it is larger than the sum of its proper divisors (228007227).

512550981 is a wasteful number, since it uses less digits than its factorization.

512550981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15912 (or 15909 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 36.

The square root of 512550981 is about 22639.5887992693. The cubic root of 512550981 is about 800.2868663931.

The spelling of 512550981 in words is "five hundred twelve million, five hundred fifty thousand, nine hundred eighty-one".