161071517 has 2 divisors, whose sum is σ = 161071518. Its totient is φ = 161071516.

The previous prime is 161071513. The next prime is 161071571. The reversal of 161071517 is 715170161.

161071517 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with next prime (161071571) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 91948921 + 69122596 = 9589^2 + 8314^2 .

It is a cyclic number.

It is not a de Polignac number, because 161071517 - 2² = 161071513 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 161071517.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161071513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80535758 + 80535759.

It is an arithmetic number, because the mean of its divisors is an integer number (80535759).

Almost surely, 2^161071517 is an apocalyptic number.

It is an amenable number.

161071517 is a deficient number, since it is larger than the sum of its proper divisors (1).

161071517 is an equidigital number, since it uses as much as digits as its factorization.

161071517 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1470, while the sum is 29.

The square root of 161071517 is about 12691.3953921545. The cubic root of 161071517 is about 544.0927215889.

The spelling of 161071517 in words is "one hundred sixty-one million, seventy-one thousand, five hundred seventeen".