161303211 has 8 divisors (see below), whose sum is σ = 238967760. Its totient is φ = 107535456.

The previous prime is 161303159. The next prime is 161303243. The reversal of 161303211 is 112303161.

It is not a de Polignac number, because 161303211 - 2⁶ = 161303147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161303281) 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, 2987070 + ... + 2987123.

It is an arithmetic number, because the mean of its divisors is an integer number (29870970).

Almost surely, 2^161303211 is an apocalyptic number.

161303211 is a deficient number, since it is larger than the sum of its proper divisors (77664549).

161303211 is an equidigital number, since it uses as much as digits as its factorization.

161303211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5974202 (or 5974196 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 161303211 is about 12700.5201074602. The cubic root of 161303211 is about 544.3534807522.

Adding to 161303211 its reverse (112303161), we get a palindrome (273606372).

Subtracting from 161303211 its reverse (112303161), we obtain a triangular number (49000050 = T₉₈₉₉).

The spelling of 161303211 in words is "one hundred sixty-one million, three hundred three thousand, two hundred eleven".