161310601 has 2 divisors, whose sum is σ = 161310602. Its totient is φ = 161310600.

The previous prime is 161310599. The next prime is 161310613. The reversal of 161310601 is 106013161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 94070601 + 67240000 = 9699^2 + 8200^2 .

It is a cyclic number.

It is not a de Polignac number, because 161310601 - 2¹ = 161310599 is a prime.

It is a super-2 number, since 2×161310601² = 52042219989962402, which contains 22 as substring.

Together with 161310599, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (161310001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80655300 + 80655301.

It is an arithmetic number, because the mean of its divisors is an integer number (80655301).

Almost surely, 2^161310601 is an apocalyptic number.

It is an amenable number.

161310601 is a deficient number, since it is larger than the sum of its proper divisors (1).

161310601 is an equidigital number, since it uses as much as digits as its factorization.

161310601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 161310601 is about 12700.8110370952. The cubic root of 161310601 is about 544.3617936902.

Adding to 161310601 its reverse (106013161), we get a palindrome (267323762).

The spelling of 161310601 in words is "one hundred sixty-one million, three hundred ten thousand, six hundred one".