161954212 has 36 divisors (see below), whose sum is σ = 341073180. Its totient is φ = 67013184.

The previous prime is 161954203. The next prime is 161954239. The reversal of 161954212 is 212459161.

161954212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 85636516 + 76317696 = 9254^2 + 8736^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8563 + ... + 19930.

It is an arithmetic number, because the mean of its divisors is an integer number (9474255).

Almost surely, 2^161954212 is an apocalyptic number.

It is an amenable number.

161954212 is an abundant number, since it is smaller than the sum of its proper divisors (179118968).

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

161954212 is a wasteful number, since it uses less digits than its factorization.

161954212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28540 (or 28531 counting only the distinct ones).

The product of its digits is 4320, while the sum is 31.

The square root of 161954212 is about 12726.1232117248. The cubic root of 161954212 is about 545.0848135547.

The spelling of 161954212 in words is "one hundred sixty-one million, nine hundred fifty-four thousand, two hundred twelve".