161575100 has 36 divisors (see below), whose sum is σ = 361935168. Its totient is φ = 62544000.

The previous prime is 161575091. The next prime is 161575103. The reversal of 161575100 is 1575161.

It is a super-2 number, since 2×161575100² = 52213025880020000, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 161575100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161575103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22961 + ... + 29160.

Almost surely, 2^161575100 is an apocalyptic number.

161575100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161575100 is an abundant number, since it is smaller than the sum of its proper divisors (200360068).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161575100 is a wasteful number, since it uses less digits than its factorization.

161575100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52166 (or 52159 counting only the distinct ones).

The product of its (nonzero) digits is 1050, while the sum is 26.

The square root of 161575100 is about 12711.2194536952. The cubic root of 161575100 is about 544.6591589904.

The spelling of 161575100 in words is "one hundred sixty-one million, five hundred seventy-five thousand, one hundred".