172274581 has 2 divisors, whose sum is σ = 172274582. Its totient is φ = 172274580.

The previous prime is 172274569. The next prime is 172274593. The reversal of 172274581 is 185472271.

It is a balanced prime because it is at equal distance from previous prime (172274569) and next prime (172274593).

It can be written as a sum of positive squares in only one way, i.e., 141372100 + 30902481 = 11890^2 + 5559^2 .

It is an emirp because it is prime and its reverse (185472271) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 172274581 - 2¹¹ = 172272533 is a prime.

It is a super-2 number, since 2×172274581² = 59357062517451122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 172274581.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172274561) 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, 86137290 + 86137291.

It is an arithmetic number, because the mean of its divisors is an integer number (86137291).

Almost surely, 2^172274581 is an apocalyptic number.

It is an amenable number.

172274581 is a deficient number, since it is larger than the sum of its proper divisors (1).

172274581 is an equidigital number, since it uses as much as digits as its factorization.

172274581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31360, while the sum is 37.

The square root of 172274581 is about 13125.3411765180. The cubic root of 172274581 is about 556.4255547218.

The spelling of 172274581 in words is "one hundred seventy-two million, two hundred seventy-four thousand, five hundred eighty-one".