512039991 has 8 divisors (see below), whose sum is σ = 684522880. Its totient is φ = 340458552.

The previous prime is 512039981. The next prime is 512039993. The reversal of 512039991 is 199930215.

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

It is not a de Polignac number, because 512039991 - 2¹⁷ = 511908919 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (512039993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 224035 + ... + 226308.

It is an arithmetic number, because the mean of its divisors is an integer number (85565360).

Almost surely, 2^512039991 is an apocalyptic number.

512039991 is a deficient number, since it is larger than the sum of its proper divisors (172482889).

512039991 is a wasteful number, since it uses less digits than its factorization.

512039991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450725.

The product of its (nonzero) digits is 21870, while the sum is 39.

The square root of 512039991 is about 22628.3006653173. The cubic root of 512039991 is about 800.0208281036.

The spelling of 512039991 in words is "five hundred twelve million, thirty-nine thousand, nine hundred ninety-one".