161145210 has 64 divisors (see below), whose sum is σ = 413465472. Its totient is φ = 40052736.

The previous prime is 161145169. The next prime is 161145253. The reversal of 161145210 is 12541161.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 53094 + ... + 56046.

It is an arithmetic number, because the mean of its divisors is an integer number (6460398).

Almost surely, 2^161145210 is an apocalyptic number.

161145210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 161145210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (206732736).

161145210 is an abundant number, since it is smaller than the sum of its proper divisors (252320262).

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

161145210 is a wasteful number, since it uses less digits than its factorization.

161145210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3087.

The product of its (nonzero) digits is 240, while the sum is 21.

The square root of 161145210 is about 12694.2983264141. The cubic root of 161145210 is about 544.1756862090.

Adding to 161145210 its reverse (12541161), we get a palindrome (173686371).

It can be divided in two parts, 1 and 61145210, that added together give a triangular number (61145211 = T₁₁₀₅₈).

The spelling of 161145210 in words is "one hundred sixty-one million, one hundred forty-five thousand, two hundred ten".