161642212 has 12 divisors (see below), whose sum is σ = 288892800. Its totient is φ = 79101416.

The previous prime is 161642207. The next prime is 161642249. The reversal of 161642212 is 212246161.

It is a happy number.

161642212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×161642212² = 52256409400505888, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 429712 + ... + 430087.

It is an arithmetic number, because the mean of its divisors is an integer number (24074400).

Almost surely, 2^161642212 is an apocalyptic number.

It is an amenable number.

161642212 is a deficient number, since it is larger than the sum of its proper divisors (127250588).

161642212 is a wasteful number, since it uses less digits than its factorization.

161642212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 859850 (or 859848 counting only the distinct ones).

The product of its digits is 1152, while the sum is 25.

The square root of 161642212 is about 12713.8590522312. The cubic root of 161642212 is about 544.7345586152.

Adding to 161642212 its reverse (212246161), we get a palindrome (373888373).

The spelling of 161642212 in words is "one hundred sixty-one million, six hundred forty-two thousand, two hundred twelve".