131111232 has 56 divisors (see below), whose sum is σ = 396459456. Its totient is φ = 37459968.

The previous prime is 131111221. The next prime is 131111243. The reversal of 131111232 is 232111131.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (131111221) and next prime (131111243).

It is a tau number, because it is divible by the number of its divisors (56).

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47433 + ... + 50120.

Almost surely, 2^131111232 is an apocalyptic number.

131111232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

131111232 is an abundant number, since it is smaller than the sum of its proper divisors (265348224).

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

131111232 is an equidigital number, since it uses as much as digits as its factorization.

131111232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97575 (or 97565 counting only the distinct ones).

The product of its digits is 36, while the sum is 15.

The square root of 131111232 is about 11450.3813036947. The cubic root of 131111232 is about 508.0190126598.

Adding to 131111232 its reverse (232111131), we get a palindrome (363222363).

The spelling of 131111232 in words is "one hundred thirty-one million, one hundred eleven thousand, two hundred thirty-two".