131224304 has 40 divisors (see below), whose sum is σ = 269171760. Its totient is φ = 61867008.

The previous prime is 131224283. The next prime is 131224307. The reversal of 131224304 is 403422131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131224307) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16664 + ... + 23240.

It is an arithmetic number, because the mean of its divisors is an integer number (6729294).

Almost surely, 2^131224304 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131224304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (134585880).

131224304 is an abundant number, since it is smaller than the sum of its proper divisors (137947456).

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

131224304 is a wasteful number, since it uses less digits than its factorization.

131224304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6657 (or 6651 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 131224304 is about 11455.3177171129. The cubic root of 131224304 is about 508.1650113911.

Adding to 131224304 its reverse (403422131), we get a palindrome (534646435).

The spelling of 131224304 in words is "one hundred thirty-one million, two hundred twenty-four thousand, three hundred four".