161151100 has 72 divisors (see below), whose sum is σ = 390475008. Its totient is φ = 57220800.

The previous prime is 161151097. The next prime is 161151119. The reversal of 161151100 is 1151161.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45597 + ... + 49003.

It is an arithmetic number, because the mean of its divisors is an integer number (5423264).

Almost surely, 2^161151100 is an apocalyptic number.

161151100 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 161151100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (195237504).

161151100 is an abundant number, since it is smaller than the sum of its proper divisors (229323908).

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

161151100 is a wasteful number, since it uses less digits than its factorization.

161151100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3475 (or 3468 counting only the distinct ones).

The product of its (nonzero) digits is 30, while the sum is 16.

The square root of 161151100 is about 12694.5303182119. The cubic root of 161151100 is about 544.1823161625.

The spelling of 161151100 in words is "one hundred sixty-one million, one hundred fifty-one thousand, one hundred".