130331561 has 2 divisors, whose sum is σ = 130331562. Its totient is φ = 130331560.

The previous prime is 130331519. The next prime is 130331569. The reversal of 130331561 is 165133031.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90250000 + 40081561 = 9500^2 + 6331^2 .

It is a cyclic number.

It is not a de Polignac number, because 130331561 - 2¹⁴ = 130315177 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (130331569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65165780 + 65165781.

It is an arithmetic number, because the mean of its divisors is an integer number (65165781).

Almost surely, 2^130331561 is an apocalyptic number.

It is an amenable number.

130331561 is a deficient number, since it is larger than the sum of its proper divisors (1).

130331561 is an equidigital number, since it uses as much as digits as its factorization.

130331561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 810, while the sum is 23.

The square root of 130331561 is about 11416.2849035928. The cubic root of 130331561 is about 507.0100082703.

Adding to 130331561 its reverse (165133031), we get a palindrome (295464592).

The spelling of 130331561 in words is "one hundred thirty million, three hundred thirty-one thousand, five hundred sixty-one".