612128223 has 12 divisors (see below), whose sum is σ = 1010497488. Its totient is φ = 349787520.

The previous prime is 612128171. The next prime is 612128239. The reversal of 612128223 is 322821216.

612128223 is a `hidden beast` number, since 612 + 1 + 28 + 2 + 23 = 666.

It is not a de Polignac number, because 612128223 - 2¹⁴ = 612111839 is a prime.

It is a super-2 number, since 2×612128223² = 749401922786275458, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (612128243) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4858098 + ... + 4858223.

It is an arithmetic number, because the mean of its divisors is an integer number (84208124).

Almost surely, 2^612128223 is an apocalyptic number.

612128223 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

612128223 is a deficient number, since it is larger than the sum of its proper divisors (398369265).

612128223 is a wasteful number, since it uses less digits than its factorization.

612128223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9716334 (or 9716331 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 612128223 is about 24741.2251717654. The cubic root of 612128223 is about 849.0777646891.

Adding to 612128223 its reverse (322821216), we get a palindrome (934949439).

The spelling of 612128223 in words is "six hundred twelve million, one hundred twenty-eight thousand, two hundred twenty-three".