511231223 has 2 divisors, whose sum is σ = 511231224. Its totient is φ = 511231222.

The previous prime is 511231211. The next prime is 511231241. The reversal of 511231223 is 322132115.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 511231223 - 2⁴ = 511231207 is a prime.

It is a super-2 number, since 2×511231223² = 522714726740151458, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 511231195 and 511231204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (511231243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255615611 + 255615612.

It is an arithmetic number, because the mean of its divisors is an integer number (255615612).

Almost surely, 2^511231223 is an apocalyptic number.

511231223 is a deficient number, since it is larger than the sum of its proper divisors (1).

511231223 is an equidigital number, since it uses as much as digits as its factorization.

511231223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 360, while the sum is 20.

The square root of 511231223 is about 22610.4228841479. The cubic root of 511231223 is about 799.5993947403.

Adding to 511231223 its reverse (322132115), we get a palindrome (833363338).

The spelling of 511231223 in words is "five hundred eleven million, two hundred thirty-one thousand, two hundred twenty-three".