161003375 has 16 divisors (see below), whose sum is σ = 216390720. Its totient is φ = 118893600.

The previous prime is 161003371. The next prime is 161003377. The reversal of 161003375 is 573300161.

It is a happy number.

It is not a de Polignac number, because 161003375 - 2² = 161003371 is a prime.

It is a super-2 number, since 2×161003375² = 51844173522781250, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161003371) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 47915 + ... + 51164.

It is an arithmetic number, because the mean of its divisors is an integer number (13524420).

Almost surely, 2^161003375 is an apocalyptic number.

161003375 is a deficient number, since it is larger than the sum of its proper divisors (55387345).

161003375 is an equidigital number, since it uses as much as digits as its factorization.

161003375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99107 (or 99097 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 26.

The square root of 161003375 is about 12688.7105333836. The cubic root of 161003375 is about 544.0159838423.

The spelling of 161003375 in words is "one hundred sixty-one million, three thousand, three hundred seventy-five".