511315979 has 4 divisors (see below), whose sum is σ = 511753800. Its totient is φ = 510878160.

The previous prime is 511315957. The next prime is 511315991. The reversal of 511315979 is 979513115.

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

It is a cyclic number.

It is not a de Polignac number, because 511315979 - 2²⁰ = 510267403 is a prime.

It is a super-2 number, since 2×511315979² = 522888060761456882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (511311979) 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 3 ways as a sum of consecutive naturals, for example, 217154 + ... + 219495.

It is an arithmetic number, because the mean of its divisors is an integer number (127938450).

Almost surely, 2^511315979 is an apocalyptic number.

511315979 is a deficient number, since it is larger than the sum of its proper divisors (437821).

511315979 is a wasteful number, since it uses less digits than its factorization.

511315979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437820.

The product of its digits is 42525, while the sum is 41.

The square root of 511315979 is about 22612.2970748219. The cubic root of 511315979 is about 799.6435802923.

The spelling of 511315979 in words is "five hundred eleven million, three hundred fifteen thousand, nine hundred seventy-nine".