130444531 has 4 divisors (see below), whose sum is σ = 149079472. Its totient is φ = 111809592.

The previous prime is 130444507. The next prime is 130444547. The reversal of 130444531 is 135444031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 135444031 = 409 ⋅331159.

It is a cyclic number.

It is not a de Polignac number, because 130444531 - 2⁹ = 130444019 is a prime.

It is a super-2 number, since 2×130444531² = 34031551335619922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 130444496 and 130444505.

It is not an unprimeable number, because it can be changed into a prime (130444571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9317460 + ... + 9317473.

It is an arithmetic number, because the mean of its divisors is an integer number (37269868).

Almost surely, 2^130444531 is an apocalyptic number.

130444531 is a deficient number, since it is larger than the sum of its proper divisors (18634941).

130444531 is an equidigital number, since it uses as much as digits as its factorization.

130444531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18634940.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 130444531 is about 11421.2315885810. The cubic root of 130444531 is about 507.1564562454.

Adding to 130444531 its reverse (135444031), we get a palindrome (265888562).

The spelling of 130444531 in words is "one hundred thirty million, four hundred forty-four thousand, five hundred thirty-one".