161205573 has 8 divisors (see below), whose sum is σ = 215701408. Its totient is φ = 107090064.

The previous prime is 161205547. The next prime is 161205599. The reversal of 161205573 is 375502161.

It is an interprime number because it is at equal distance from previous prime (161205547) and next prime (161205599).

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

It is a de Polignac number, because none of the positive numbers 2^k-161205573 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 161205573.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161205773) 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, 94090 + ... + 95787.

It is an arithmetic number, because the mean of its divisors is an integer number (26962676).

Almost surely, 2^161205573 is an apocalyptic number.

It is an amenable number.

161205573 is a deficient number, since it is larger than the sum of its proper divisors (54495835).

161205573 is a wasteful number, since it uses less digits than its factorization.

161205573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190163.

The product of its (nonzero) digits is 6300, while the sum is 30.

The square root of 161205573 is about 12696.6756672761. The cubic root of 161205573 is about 544.2436248843.

The spelling of 161205573 in words is "one hundred sixty-one million, two hundred five thousand, five hundred seventy-three".