161215055 has 8 divisors (see below), whose sum is σ = 194195232. Its totient is φ = 128480608.

The previous prime is 161215007. The next prime is 161215069. The reversal of 161215055 is 550512161.

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

It is a cyclic number.

It is not a de Polignac number, because 161215055 - 2²⁶ = 94106191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59984 + ... + 62613.

It is an arithmetic number, because the mean of its divisors is an integer number (24274404).

Almost surely, 2^161215055 is an apocalyptic number.

161215055 is a deficient number, since it is larger than the sum of its proper divisors (32980177).

161215055 is a wasteful number, since it uses less digits than its factorization.

161215055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122865.

The product of its (nonzero) digits is 1500, while the sum is 26.

The square root of 161215055 is about 12697.0490666139. The cubic root of 161215055 is about 544.2542953526.

The spelling of 161215055 in words is "one hundred sixty-one million, two hundred fifteen thousand, fifty-five".