161152081 has 2 divisors, whose sum is σ = 161152082. Its totient is φ = 161152080.

The previous prime is 161152001. The next prime is 161152097. The reversal of 161152081 is 180251161.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 148620481 + 12531600 = 12191^2 + 3540^2 .

It is a cyclic number.

It is not a de Polignac number, because 161152081 - 2¹⁹ = 160627793 is a prime.

It is a super-2 number, since 2×161152081² = 51939986421261122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (161152001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80576040 + 80576041.

It is an arithmetic number, because the mean of its divisors is an integer number (80576041).

Almost surely, 2^161152081 is an apocalyptic number.

It is an amenable number.

161152081 is a deficient number, since it is larger than the sum of its proper divisors (1).

161152081 is an equidigital number, since it uses as much as digits as its factorization.

161152081 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 161152081 is about 12694.5689568413. The cubic root of 161152081 is about 544.1834203886.

The spelling of 161152081 in words is "one hundred sixty-one million, one hundred fifty-two thousand, eighty-one".