111231648 has 72 divisors (see below), whose sum is σ = 345080736. Its totient is φ = 33705600.

The previous prime is 111231613. The next prime is 111231649. The reversal of 111231648 is 846132111.

It is a happy number.

111231648 is a `hidden beast` number, since 1 + 1 + 12 + 3 + 1 + 648 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (111231649) 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, 14388 + ... + 20723.

It is an arithmetic number, because the mean of its divisors is an integer number (4792788).

Almost surely, 2^111231648 is an apocalyptic number.

111231648 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

111231648 is an abundant number, since it is smaller than the sum of its proper divisors (233849088).

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

111231648 is a wasteful number, since it uses less digits than its factorization.

111231648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35138 (or 35127 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

The square root of 111231648 is about 10546.6415507497. The cubic root of 111231648 is about 480.9236382193.

Adding to 111231648 its reverse (846132111), we get a palindrome (957363759).

The spelling of 111231648 in words is "one hundred eleven million, two hundred thirty-one thousand, six hundred forty-eight".