2130404581 has 2 divisors, whose sum is σ = 2130404582. Its totient is φ = 2130404580.

The previous prime is 2130404569. The next prime is 2130404597. The reversal of 2130404581 is 1854040312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1916250625 + 214153956 = 43775^2 + 14634^2 .

It is a cyclic number.

It is not a de Polignac number, because 2130404581 - 2⁹ = 2130404069 is a prime.

It is a super-2 number, since 2×2130404581² = 9077247357491571122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2130404281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1065202290 + 1065202291.

It is an arithmetic number, because the mean of its divisors is an integer number (1065202291).

Almost surely, 2^2130404581 is an apocalyptic number.

It is an amenable number.

2130404581 is a deficient number, since it is larger than the sum of its proper divisors (1).

2130404581 is an equidigital number, since it uses as much as digits as its factorization.

2130404581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 2130404581 is about 46156.3059722071. The cubic root of 2130404581 is about 1286.7298098343.

Adding to 2130404581 its reverse (1854040312), we get a palindrome (3984444893).

The spelling of 2130404581 in words is "two billion, one hundred thirty million, four hundred four thousand, five hundred eighty-one".