161131835 has 8 divisors (see below), whose sum is σ = 195165936. Its totient is φ = 127700320.

The previous prime is 161131829. The next prime is 161131843. The reversal of 161131835 is 538131161.

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

It is not a de Polignac number, because 161131835 - 2⁶ = 161131771 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 161131798 and 161131807.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150056 + ... + 151125.

It is an arithmetic number, because the mean of its divisors is an integer number (24395742).

Almost surely, 2^161131835 is an apocalyptic number.

161131835 is a deficient number, since it is larger than the sum of its proper divisors (34034101).

161131835 is a wasteful number, since it uses less digits than its factorization.

161131835 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301293.

The product of its digits is 2160, while the sum is 29.

The square root of 161131835 is about 12693.7715041669. The cubic root of 161131835 is about 544.1606303242.

Adding to 161131835 its reverse (538131161), we get a palindrome (699262996).

The spelling of 161131835 in words is "one hundred sixty-one million, one hundred thirty-one thousand, eight hundred thirty-five".