161210211 has 8 divisors (see below), whose sum is σ = 215138304. Its totient is φ = 107377800.

The previous prime is 161210191. The next prime is 161210249. The reversal of 161210211 is 112012161.

It is a happy number.

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

It is not a de Polignac number, because 161210211 - 2⁷ = 161210083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161210011) 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, 19891 + ... + 26796.

It is an arithmetic number, because the mean of its divisors is an integer number (26892288).

Almost surely, 2^161210211 is an apocalyptic number.

161210211 is a deficient number, since it is larger than the sum of its proper divisors (53928093).

161210211 is a wasteful number, since it uses less digits than its factorization.

161210211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47841.

The product of its (nonzero) digits is 24, while the sum is 15.

The square root of 161210211 is about 12696.8583121968. The cubic root of 161210211 is about 544.2488442608.

Adding to 161210211 its reverse (112012161), we get a palindrome (273222372).

The spelling of 161210211 in words is "one hundred sixty-one million, two hundred ten thousand, two hundred eleven".