161115023 has 8 divisors (see below), whose sum is σ = 172030848. Its totient is φ = 150525144.

The previous prime is 161114999. The next prime is 161115043. The reversal of 161115023 is 320511161.

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 161115023 - 2⁶ = 161114959 is a prime.

It is a super-3 number, since 3×161115023³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 161114986 and 161115004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161115043) 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, 80465 + ... + 82442.

It is an arithmetic number, because the mean of its divisors is an integer number (21503856).

Almost surely, 2^161115023 is an apocalyptic number.

161115023 is a deficient number, since it is larger than the sum of its proper divisors (10915825).

161115023 is a wasteful number, since it uses less digits than its factorization.

161115023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162973.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 161115023 is about 12693.1092723572. The cubic root of 161115023 is about 544.1417043172.

Adding to 161115023 its reverse (320511161), we get a palindrome (481626184).

The spelling of 161115023 in words is "one hundred sixty-one million, one hundred fifteen thousand, twenty-three".