52161181 has 2 divisors, whose sum is σ = 52161182. Its totient is φ = 52161180.

The previous prime is 52161173. The next prime is 52161203. The reversal of 52161181 is 18116125.

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., 49491225 + 2669956 = 7035^2 + 1634^2 .

It is a cyclic number.

It is not a de Polignac number, because 52161181 - 2³ = 52161173 is a prime.

It is a super-2 number, since 2×52161181² = 5441577606629522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52161121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26080590 + 26080591.

It is an arithmetic number, because the mean of its divisors is an integer number (26080591).

Almost surely, 2^52161181 is an apocalyptic number.

It is an amenable number.

52161181 is a deficient number, since it is larger than the sum of its proper divisors (1).

52161181 is an equidigital number, since it uses as much as digits as its factorization.

52161181 is an evil number, because the sum of its binary digits is even.

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

The square root of 52161181 is about 7222.2697955698. The cubic root of 52161181 is about 373.6363652706.

The spelling of 52161181 in words is "fifty-two million, one hundred sixty-one thousand, one hundred eighty-one".