161471700 has 216 divisors, whose sum is σ = 561288728. Its totient is φ = 38568960.

The previous prime is 161471677. The next prime is 161471711. The reversal of 161471700 is 7174161.

It can be written as a sum of positive squares in 12 ways, for example, as 34503876 + 126967824 = 5874^2 + 11268^2 .

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 71 ways as a sum of consecutive naturals, for example, 432714 + ... + 433086.

Almost surely, 2^161471700 is an apocalyptic number.

161471700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161471700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (280644364).

161471700 is an abundant number, since it is smaller than the sum of its proper divisors (399817028).

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

161471700 is a wasteful number, since it uses less digits than its factorization.

161471700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443 (or 433 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 27.

The square root of 161471700 is about 12707.1515297489. The cubic root of 161471700 is about 544.5429493046.

The spelling of 161471700 in words is "one hundred sixty-one million, four hundred seventy-one thousand, seven hundred".