511882985 has 4 divisors (see below), whose sum is σ = 614259588. Its totient is φ = 409506384.

The previous prime is 511882967. The next prime is 511882999. The reversal of 511882985 is 589288115.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 123832384 + 388050601 = 11128^2 + 19699^2 .

It is a cyclic number.

It is not a de Polignac number, because 511882985 - 2¹⁰ = 511881961 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51188294 + ... + 51188303.

It is an arithmetic number, because the mean of its divisors is an integer number (153564897).

Almost surely, 2^511882985 is an apocalyptic number.

It is an amenable number.

511882985 is a deficient number, since it is larger than the sum of its proper divisors (102376603).

511882985 is a wasteful number, since it uses less digits than its factorization.

511882985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102376602.

The product of its digits is 230400, while the sum is 47.

The square root of 511882985 is about 22624.8311595910. The cubic root of 511882985 is about 799.9390500440.

The spelling of 511882985 in words is "five hundred eleven million, eight hundred eighty-two thousand, nine hundred eighty-five".