131444004 has 24 divisors (see below), whose sum is σ = 311024448. Its totient is φ = 43197280.

The previous prime is 131444003. The next prime is 131444009. The reversal of 131444004 is 400444131.

It is not an unprimeable number, because it can be changed into a prime (131444003) 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, 76287 + ... + 77990.

It is an arithmetic number, because the mean of its divisors is an integer number (12959352).

Almost surely, 2^131444004 is an apocalyptic number.

It is an amenable number.

131444004 is an abundant number, since it is smaller than the sum of its proper divisors (179580444).

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

131444004 is a wasteful number, since it uses less digits than its factorization.

131444004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154355 (or 154353 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 131444004 is about 11464.9031395821. The cubic root of 131444004 is about 508.4484487361.

Adding to 131444004 its reverse (400444131), we get a palindrome (531888135).

The spelling of 131444004 in words is "one hundred thirty-one million, four hundred forty-four thousand, four".