511220023 has 8 divisors (see below), whose sum is σ = 542890800. Its totient is φ = 480025728.

The previous prime is 511219993. The next prime is 511220027. The reversal of 511220023 is 320022115.

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

It is a de Polignac number, because none of the positive numbers 2^k-511220023 is a prime.

It is a super-2 number, since 2×511220023² = 522691823832241058, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 511219979 and 511220006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (511220027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116908 + ... + 121201.

It is an arithmetic number, because the mean of its divisors is an integer number (67861350).

Almost surely, 2^511220023 is an apocalyptic number.

511220023 is a deficient number, since it is larger than the sum of its proper divisors (31670777).

511220023 is a wasteful number, since it uses less digits than its factorization.

511220023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238241.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 511220023 is about 22610.1752094052. The cubic root of 511220023 is about 799.5935555177.

Adding to 511220023 its reverse (320022115), we get a palindrome (831242138).

The spelling of 511220023 in words is "five hundred eleven million, two hundred twenty thousand, twenty-three".