161210144 has 12 divisors (see below), whose sum is σ = 317382534. Its totient is φ = 80605056.

The previous prime is 161210143. The next prime is 161210173. The reversal of 161210144 is 441012161.

It can be written as a sum of positive squares in only one way, i.e., 103632400 + 57577744 = 10180^2 + 7588^2 .

It is not an unprimeable number, because it can be changed into a prime (161210143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2518877 + ... + 2518940.

Almost surely, 2^161210144 is an apocalyptic number.

It is an amenable number.

161210144 is a deficient number, since it is larger than the sum of its proper divisors (156172390).

161210144 is an equidigital number, since it uses as much as digits as its factorization.

161210144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5037827 (or 5037819 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 161210144 is about 12696.8556737485. The cubic root of 161210144 is about 544.2487688630.

The spelling of 161210144 in words is "one hundred sixty-one million, two hundred ten thousand, one hundred forty-four".