161224255 has 8 divisors (see below), whose sum is σ = 193657824. Its totient is φ = 128853600.

The previous prime is 161224183. The next prime is 161224267. The reversal of 161224255 is 552422161.

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

It is not a de Polignac number, because 161224255 - 2⁷ = 161224127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9891 + ... + 20500.

It is an arithmetic number, because the mean of its divisors is an integer number (24207228).

Almost surely, 2^161224255 is an apocalyptic number.

161224255 is a deficient number, since it is larger than the sum of its proper divisors (32433569).

161224255 is a wasteful number, since it uses less digits than its factorization.

161224255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31457.

The product of its digits is 4800, while the sum is 28.

The square root of 161224255 is about 12697.4113503501. The cubic root of 161224255 is about 544.2646480753.

The spelling of 161224255 in words is "one hundred sixty-one million, two hundred twenty-four thousand, two hundred fifty-five".