161355055 has 8 divisors (see below), whose sum is σ = 197279712. Its totient is φ = 126648288.

The previous prime is 161355053. The next prime is 161355059. The reversal of 161355055 is 550553161.

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 161355055 - 2¹ = 161355053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161355053) 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, 304179 + ... + 304708.

It is an arithmetic number, because the mean of its divisors is an integer number (24659964).

Almost surely, 2^161355055 is an apocalyptic number.

161355055 is a deficient number, since it is larger than the sum of its proper divisors (35924657).

161355055 is an equidigital number, since it uses as much as digits as its factorization.

161355055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 608945.

The product of its (nonzero) digits is 11250, while the sum is 31.

The square root of 161355055 is about 12702.5609622627. The cubic root of 161355055 is about 544.4117941995.

It can be divided in two parts, 161 and 355055, that added together give a square (355216 = 596²).

The spelling of 161355055 in words is "one hundred sixty-one million, three hundred fifty-five thousand, fifty-five".