161317400 has 48 divisors (see below), whose sum is σ = 391381200. Its totient is φ = 61719680.

The previous prime is 161317399. The next prime is 161317421. The reversal of 161317400 is 4713161.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12935 + ... + 22134.

It is an arithmetic number, because the mean of its divisors is an integer number (8153775).

Almost surely, 2^161317400 is an apocalyptic number.

161317400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161317400 is an abundant number, since it is smaller than the sum of its proper divisors (230063800).

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

161317400 is a wasteful number, since it uses less digits than its factorization.

161317400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35108 (or 35099 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 161317400 is about 12701.0786943472. The cubic root of 161317400 is about 544.3694415940.

The spelling of 161317400 in words is "one hundred sixty-one million, three hundred seventeen thousand, four hundred".