130216981 has 2 divisors, whose sum is σ = 130216982. Its totient is φ = 130216980.

The previous prime is 130216963. The next prime is 130216987. The reversal of 130216981 is 189612031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 126922756 + 3294225 = 11266^2 + 1815^2 .

It is a cyclic number.

It is not a de Polignac number, because 130216981 - 2²³ = 121828373 is a prime.

It is a super-2 number, since 2×130216981² = 33912924281508722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (130216987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65108490 + 65108491.

It is an arithmetic number, because the mean of its divisors is an integer number (65108491).

Almost surely, 2^130216981 is an apocalyptic number.

It is an amenable number.

130216981 is a deficient number, since it is larger than the sum of its proper divisors (1).

130216981 is an equidigital number, since it uses as much as digits as its factorization.

130216981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 130216981 is about 11411.2655301680. The cubic root of 130216981 is about 506.8613867119.

It can be divided in two parts, 13021 and 6981, that added together give a palindrome (20002).

The spelling of 130216981 in words is "one hundred thirty million, two hundred sixteen thousand, nine hundred eighty-one".