161713831 has 8 divisors (see below), whose sum is σ = 167796720. Its totient is φ = 155664768.

The previous prime is 161713829. The next prime is 161713837. The reversal of 161713831 is 138317161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 161713831 - 2¹ = 161713829 is a prime.

It is a super-2 number, since 2×161713831² = 52302726273393122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 161713793 and 161713802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161713837) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1500 + ... + 18046.

It is an arithmetic number, because the mean of its divisors is an integer number (20974590).

Almost surely, 2^161713831 is an apocalyptic number.

161713831 is a deficient number, since it is larger than the sum of its proper divisors (6082889).

161713831 is a wasteful number, since it uses less digits than its factorization.

161713831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16913.

The product of its digits is 3024, while the sum is 31.

The square root of 161713831 is about 12716.6753123605. The cubic root of 161713831 is about 544.8149987910.

It can be divided in two parts, 16171 and 3831, that added together give a palindrome (20002).

The spelling of 161713831 in words is "one hundred sixty-one million, seven hundred thirteen thousand, eight hundred thirty-one".