161210222 has 8 divisors (see below), whose sum is σ = 243043416. Its totient is φ = 80195752.

The previous prime is 161210191. The next prime is 161210249. The reversal of 161210222 is 222012161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 161210222.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 204188 + ... + 204975.

It is an arithmetic number, because the mean of its divisors is an integer number (30380427).

Almost surely, 2^161210222 is an apocalyptic number.

161210222 is a deficient number, since it is larger than the sum of its proper divisors (81833194).

161210222 is a wasteful number, since it uses less digits than its factorization.

161210222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409362.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 161210222 is about 12696.8587453748. The cubic root of 161210222 is about 544.2488566395.

Adding to 161210222 its reverse (222012161), we get a palindrome (383222383).

The spelling of 161210222 in words is "one hundred sixty-one million, two hundred ten thousand, two hundred twenty-two".