161182517 has 2 divisors, whose sum is σ = 161182518. Its totient is φ = 161182516.

The previous prime is 161182481. The next prime is 161182573. The reversal of 161182517 is 715281161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 117635716 + 43546801 = 10846^2 + 6599^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161182517 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161182577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80591258 + 80591259.

It is an arithmetic number, because the mean of its divisors is an integer number (80591259).

Almost surely, 2^161182517 is an apocalyptic number.

It is an amenable number.

161182517 is a deficient number, since it is larger than the sum of its proper divisors (1).

161182517 is an equidigital number, since it uses as much as digits as its factorization.

161182517 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3360, while the sum is 32.

The square root of 161182517 is about 12695.7676806092. The cubic root of 161182517 is about 544.2176773131.

The spelling of 161182517 in words is "one hundred sixty-one million, one hundred eighty-two thousand, five hundred seventeen".