161227206 has 32 divisors (see below), whose sum is σ = 409466880. Its totient is φ = 46064808.

The previous prime is 161227189. The next prime is 161227207. The reversal of 161227206 is 602722161.

161227206 is a `hidden beast` number, since 1 + 612 + 27 + 20 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 161227206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161227207) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 212886 + ... + 213641.

It is an arithmetic number, because the mean of its divisors is an integer number (12795840).

Almost surely, 2^161227206 is an apocalyptic number.

161227206 is an abundant number, since it is smaller than the sum of its proper divisors (248239674).

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

161227206 is a wasteful number, since it uses less digits than its factorization.

161227206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426545 (or 426539 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 161227206 is about 12697.5275546068. The cubic root of 161227206 is about 544.2679687402.

Adding to 161227206 its reverse (602722161), we get a palindrome (763949367).

The spelling of 161227206 in words is "one hundred sixty-one million, two hundred twenty-seven thousand, two hundred six".