130331444 has 6 divisors (see below), whose sum is σ = 228080034. Its totient is φ = 65165720.

The previous prime is 130331437. The next prime is 130331447. The reversal of 130331444 is 444133031.

It can be written as a sum of positive squares in only one way, i.e., 125708944 + 4622500 = 11212^2 + 2150^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130331447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16291427 + ... + 16291434.

It is an arithmetic number, because the mean of its divisors is an integer number (38013339).

Almost surely, 2^130331444 is an apocalyptic number.

It is an amenable number.

130331444 is a deficient number, since it is larger than the sum of its proper divisors (97748590).

130331444 is a wasteful number, since it uses less digits than its factorization.

130331444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32582865 (or 32582863 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 130331444 is about 11416.2797793327. The cubic root of 130331444 is about 507.0098565542.

Adding to 130331444 its reverse (444133031), we get a palindrome (574464475).

The spelling of 130331444 in words is "one hundred thirty million, three hundred thirty-one thousand, four hundred forty-four".