161011481 has 2 divisors, whose sum is σ = 161011482. Its totient is φ = 161011480.

The previous prime is 161011463. The next prime is 161011577. The reversal of 161011481 is 184110161.

161011481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 129595456 + 31416025 = 11384^2 + 5605^2 .

It is a cyclic number.

It is not a de Polignac number, because 161011481 - 2¹⁰ = 161010457 is a prime.

It is a super-2 number, since 2×161011481² = 51849394027626722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (161011441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80505740 + 80505741.

It is an arithmetic number, because the mean of its divisors is an integer number (80505741).

Almost surely, 2^161011481 is an apocalyptic number.

It is an amenable number.

161011481 is a deficient number, since it is larger than the sum of its proper divisors (1).

161011481 is an equidigital number, since it uses as much as digits as its factorization.

161011481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 23.

The square root of 161011481 is about 12689.0299471630. The cubic root of 161011481 is about 544.0251135051.

The spelling of 161011481 in words is "one hundred sixty-one million, eleven thousand, four hundred eighty-one".