512166540 has 48 divisors (see below), whose sum is σ = 1453723488. Its totient is φ = 134705664.

The previous prime is 512166533. The next prime is 512166541. The reversal of 512166540 is 45661215.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 512166498 and 512166507.

It is not an unprimeable number, because it can be changed into a prime (512166541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54087 + ... + 62846.

It is an arithmetic number, because the mean of its divisors is an integer number (30285906).

Almost surely, 2^512166540 is an apocalyptic number.

It is an amenable number.

512166540 is an abundant number, since it is smaller than the sum of its proper divisors (941556948).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

512166540 is a wasteful number, since it uses less digits than its factorization.

512166540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117018 (or 117016 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 512166540 is about 22631.0967476170. The cubic root of 512166540 is about 800.0867301803.

The spelling of 512166540 in words is "five hundred twelve million, one hundred sixty-six thousand, five hundred forty".