268128231 has 16 divisors (see below), whose sum is σ = 408807168. Its totient is φ = 153129600.

The previous prime is 268128221. The next prime is 268128271. The reversal of 268128231 is 132821862.

It is not a de Polignac number, because 268128231 - 2⁶ = 268128167 is a prime.

It is a super-2 number, since 2×268128231² = 143785496518378722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 268128192 and 268128201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (268128221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63496 + ... + 67586.

It is an arithmetic number, because the mean of its divisors is an integer number (25550448).

Almost surely, 2^268128231 is an apocalyptic number.

268128231 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

268128231 is a deficient number, since it is larger than the sum of its proper divisors (140678937).

268128231 is a wasteful number, since it uses less digits than its factorization.

268128231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7222.

The product of its digits is 9216, while the sum is 33.

The square root of 268128231 is about 16374.6215528787. The cubic root of 268128231 is about 644.8333852438.

The spelling of 268128231 in words is "two hundred sixty-eight million, one hundred twenty-eight thousand, two hundred thirty-one".