511138863 has 16 divisors (see below), whose sum is σ = 761056000. Its totient is φ = 339043320.

The previous prime is 511138829. The next prime is 511138897. The reversal of 511138863 is 368831115.

511138863 is a `hidden beast` number, since 511 + 1 + 3 + 88 + 63 = 666.

It is an interprime number because it is at equal distance from previous prime (511138829) and next prime (511138897).

It is not a de Polignac number, because 511138863 - 2¹³ = 511130671 is a prime.

It is a super-2 number, since 2×511138863² = 522525874537865538, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (511138363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42193 + ... + 52938.

It is an arithmetic number, because the mean of its divisors is an integer number (47566000).

Almost surely, 2^511138863 is an apocalyptic number.

511138863 is a deficient number, since it is larger than the sum of its proper divisors (249917137).

511138863 is a wasteful number, since it uses less digits than its factorization.

511138863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95339 (or 95333 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 511138863 is about 22608.3803710040. The cubic root of 511138863 is about 799.5512394604.

Adding to 511138863 its reverse (368831115), we get a palindrome (879969978).

The spelling of 511138863 in words is "five hundred eleven million, one hundred thirty-eight thousand, eight hundred sixty-three".