161315071 has 4 divisors (see below), whose sum is σ = 162742752. Its totient is φ = 159887392.

The previous prime is 161315039. The next prime is 161315083. The reversal of 161315071 is 170513161.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 161315071 - 2⁵ = 161315039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161318071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 713671 + ... + 713896.

It is an arithmetic number, because the mean of its divisors is an integer number (40685688).

Almost surely, 2^161315071 is an apocalyptic number.

161315071 is a deficient number, since it is larger than the sum of its proper divisors (1427681).

161315071 is a wasteful number, since it uses less digits than its factorization.

161315071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1427680.

The product of its (nonzero) digits is 630, while the sum is 25.

The square root of 161315071 is about 12700.9870088903. The cubic root of 161315071 is about 544.3668218259.

The spelling of 161315071 in words is "one hundred sixty-one million, three hundred fifteen thousand, seventy-one".