510996985 has 8 divisors (see below), whose sum is σ = 617673096. Its totient is φ = 405813120.

The previous prime is 510996949. The next prime is 510997021. The reversal of 510996985 is 589699015.

It is an interprime number because it is at equal distance from previous prime (510996949) and next prime (510997021).

It can be written as a sum of positive squares in 4 ways, for example, as 189117504 + 321879481 = 13752^2 + 17941^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 510996985 - 2¹¹ = 510994937 is a prime.

It is a super-2 number, since 2×510996985² = 522235837358180450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 372306 + ... + 373675.

It is an arithmetic number, because the mean of its divisors is an integer number (77209137).

Almost surely, 2^510996985 is an apocalyptic number.

It is an amenable number.

510996985 is a deficient number, since it is larger than the sum of its proper divisors (106676111).

510996985 is a wasteful number, since it uses less digits than its factorization.

510996985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 746123.

The product of its (nonzero) digits is 874800, while the sum is 52.

The square root of 510996985 is about 22605.2424229425. The cubic root of 510996985 is about 799.4772548505.

The spelling of 510996985 in words is "five hundred ten million, nine hundred ninety-six thousand, nine hundred eighty-five".