161288222 has 16 divisors (see below), whose sum is σ = 248458752. Its totient is φ = 78492960.

The previous prime is 161288221. The next prime is 161288251. The reversal of 161288222 is 222882161.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161288221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7472 + ... + 19452.

It is an arithmetic number, because the mean of its divisors is an integer number (15528672).

Almost surely, 2^161288222 is an apocalyptic number.

161288222 is a deficient number, since it is larger than the sum of its proper divisors (87170530).

161288222 is a wasteful number, since it uses less digits than its factorization.

161288222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12163.

The product of its digits is 6144, while the sum is 32.

The square root of 161288222 is about 12699.9299998071. The cubic root of 161288222 is about 544.3366189943.

The spelling of 161288222 in words is "one hundred sixty-one million, two hundred eighty-eight thousand, two hundred twenty-two".