231222231000 has 192 divisors, whose sum is σ = 781849972800. Its totient is φ = 61634112000.

The previous prime is 231222230999. The next prime is 231222231013. The reversal of 231222231000 is 132222132.

It is a super-2 number, since 2×231222231000² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 35195716 + ... + 35202284.

It is an arithmetic number, because the mean of its divisors is an integer number (4072135275).

Almost surely, 2^231222231000 is an apocalyptic number.

231222231000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231222231000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (390924986400).

231222231000 is an abundant number, since it is smaller than the sum of its proper divisors (550627741800).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231222231000 is a wasteful number, since it uses less digits than its factorization.

231222231000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10507 (or 10490 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 231222231000 its reverse (132222132), we get a palindrome (231354453132).

The spelling of 231222231000 in words is "two hundred thirty-one billion, two hundred twenty-two million, two hundred thirty-one thousand".