131224992 has 96 divisors (see below), whose sum is σ = 357654528. Its totient is φ = 42099456.

The previous prime is 131224931. The next prime is 131224993. The reversal of 131224992 is 299422131.

It is a tau number, because it is divible by the number of its divisors (96).

It is not an unprimeable number, because it can be changed into a prime (131224993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 342433 + ... + 342815.

It is an arithmetic number, because the mean of its divisors is an integer number (3725568).

Almost surely, 2^131224992 is an apocalyptic number.

131224992 is a gapful number since it is divisible by the number (12) 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 131224992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (178827264).

131224992 is an abundant number, since it is smaller than the sum of its proper divisors (226429536).

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

131224992 is a wasteful number, since it uses less digits than its factorization.

131224992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 522 (or 514 counting only the distinct ones).

The product of its digits is 7776, while the sum is 33.

The square root of 131224992 is about 11455.3477467949. The cubic root of 131224992 is about 508.1658994809.

The spelling of 131224992 in words is "one hundred thirty-one million, two hundred twenty-four thousand, nine hundred ninety-two".