167252581 has 2 divisors, whose sum is σ = 167252582. Its totient is φ = 167252580.

The previous prime is 167252557. The next prime is 167252587. The reversal of 167252581 is 185252761.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 158004900 + 9247681 = 12570^2 + 3041^2 .

It is a cyclic number.

It is not a de Polignac number, because 167252581 - 2⁵ = 167252549 is a prime.

It is a super-2 number, since 2×167252581² = 55946851702323122, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 167252581.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (167252587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83626290 + 83626291.

It is an arithmetic number, because the mean of its divisors is an integer number (83626291).

Almost surely, 2^167252581 is an apocalyptic number.

It is an amenable number.

167252581 is a deficient number, since it is larger than the sum of its proper divisors (1).

167252581 is an equidigital number, since it uses as much as digits as its factorization.

167252581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 33600, while the sum is 37.

The square root of 167252581 is about 12932.6169432176. The cubic root of 167252581 is about 550.9653360977.

It can be divided in two parts, 16725 and 2581, that added together give a triangular number (19306 = T₁₉₆).

The spelling of 167252581 in words is "one hundred sixty-seven million, two hundred fifty-two thousand, five hundred eighty-one".