130228561 has 2 divisors, whose sum is σ = 130228562. Its totient is φ = 130228560.

The previous prime is 130228559. The next prime is 130228573. The reversal of 130228561 is 165822031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69622336 + 60606225 = 8344^2 + 7785^2 .

It is an emirp because it is prime and its reverse (165822031) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 130228561 - 2¹ = 130228559 is a prime.

Together with 130228559, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (130226561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65114280 + 65114281.

It is an arithmetic number, because the mean of its divisors is an integer number (65114281).

Almost surely, 2^130228561 is an apocalyptic number.

130228561 is the 5104-th centered decagonal number.

It is an amenable number.

130228561 is a deficient number, since it is larger than the sum of its proper divisors (1).

130228561 is an equidigital number, since it uses as much as digits as its factorization.

130228561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 130228561 is about 11411.7729122166. The cubic root of 130228561 is about 506.8764110731.

The spelling of 130228561 in words is "one hundred thirty million, two hundred twenty-eight thousand, five hundred sixty-one".