161233375 has 8 divisors (see below), whose sum is σ = 201219408. Its totient is φ = 128986600.

The previous prime is 161233363. The next prime is 161233399. The reversal of 161233375 is 573332161.

It is not a de Polignac number, because 161233375 - 2¹⁵ = 161200607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 644809 + ... + 645058.

It is an arithmetic number, because the mean of its divisors is an integer number (25152426).

Almost surely, 2^161233375 is an apocalyptic number.

161233375 is a deficient number, since it is larger than the sum of its proper divisors (39986033).

161233375 is an equidigital number, since it uses as much as digits as its factorization.

161233375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1289882 (or 1289872 counting only the distinct ones).

The product of its digits is 11340, while the sum is 31.

The square root of 161233375 is about 12697.7704735910. The cubic root of 161233375 is about 544.2749103856.

The spelling of 161233375 in words is "one hundred sixty-one million, two hundred thirty-three thousand, three hundred seventy-five".