361159181 has 2 divisors, whose sum is σ = 361159182. Its totient is φ = 361159180.

The previous prime is 361159159. The next prime is 361159217. The reversal of 361159181 is 181951163.

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., 342583081 + 18576100 = 18509^2 + 4310^2 .

It is a cyclic number.

It is not a de Polignac number, because 361159181 - 2¹⁸ = 360897037 is a prime.

It is a super-2 number, since 2×361159181² = 260871908041181522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (361159111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 180579590 + 180579591.

It is an arithmetic number, because the mean of its divisors is an integer number (180579591).

Almost surely, 2^361159181 is an apocalyptic number.

It is an amenable number.

361159181 is a deficient number, since it is larger than the sum of its proper divisors (1).

361159181 is an equidigital number, since it uses as much as digits as its factorization.

361159181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480, while the sum is 35.

The square root of 361159181 is about 19004.1885120097. The cubic root of 361159181 is about 712.1413767623.

The spelling of 361159181 in words is "three hundred sixty-one million, one hundred fifty-nine thousand, one hundred eighty-one".