161244473 has 8 divisors (see below), whose sum is σ = 183862728. Its totient is φ = 140085504.

The previous prime is 161244449. The next prime is 161244487. The reversal of 161244473 is 374442161.

161244473 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 27541504 + 133702969 = 5248^2 + 11563^2 .

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

It is not a de Polignac number, because 161244473 - 2¹⁶ = 161178937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161244403) 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, 364586 + ... + 365027.

It is an arithmetic number, because the mean of its divisors is an integer number (22982841).

Almost surely, 2^161244473 is an apocalyptic number.

161244473 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

161244473 is a deficient number, since it is larger than the sum of its proper divisors (22618255).

161244473 is a wasteful number, since it uses less digits than its factorization.

161244473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 729643.

The product of its digits is 16128, while the sum is 32.

The square root of 161244473 is about 12698.2074719230. The cubic root of 161244473 is about 544.2873979250.

The spelling of 161244473 in words is "one hundred sixty-one million, two hundred forty-four thousand, four hundred seventy-three".