116210581 has 2 divisors, whose sum is σ = 116210582. Its totient is φ = 116210580.

The previous prime is 116210579. The next prime is 116210597. The reversal of 116210581 is 185012611.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80102500 + 36108081 = 8950^2 + 6009^2 .

It is a cyclic number.

It is not a de Polignac number, because 116210581 - 2¹ = 116210579 is a prime.

It is a super-2 number, since 2×116210581² = 27009798272715122, which contains 22 as substring.

Together with 116210579, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (116210531) 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 as a sum of consecutive naturals, namely, 58105290 + 58105291.

It is an arithmetic number, because the mean of its divisors is an integer number (58105291).

Almost surely, 2^116210581 is an apocalyptic number.

It is an amenable number.

116210581 is a deficient number, since it is larger than the sum of its proper divisors (1).

116210581 is an equidigital number, since it uses as much as digits as its factorization.

116210581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 480, while the sum is 25.

The square root of 116210581 is about 10780.1011590801. The cubic root of 116210581 is about 487.9948336034.

It can be divided in two parts, 116210 and 581, that multiplied together give a triangular number (67518010 = T₁₁₆₂₀).

The spelling of 116210581 in words is "one hundred sixteen million, two hundred ten thousand, five hundred eighty-one".