161210912 has 48 divisors (see below), whose sum is σ = 329962752. Its totient is φ = 77448960.

The previous prime is 161210899. The next prime is 161210921. The reversal of 161210912 is 219012161.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 161198 + ... + 162194.

It is an arithmetic number, because the mean of its divisors is an integer number (6874224).

Almost surely, 2^161210912 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161210912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (164981376).

161210912 is an abundant number, since it is smaller than the sum of its proper divisors (168751840).

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

161210912 is a wasteful number, since it uses less digits than its factorization.

161210912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1201 (or 1193 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 23.

The square root of 161210912 is about 12696.8859174209. The cubic root of 161210912 is about 544.2496331229.

The spelling of 161210912 in words is "one hundred sixty-one million, two hundred ten thousand, nine hundred twelve".