161432055 has 32 divisors (see below), whose sum is σ = 299473920. Its totient is φ = 82352160.

The previous prime is 161432041. The next prime is 161432057. The reversal of 161432055 is 550234161.

It is not a de Polignac number, because 161432055 - 2⁴ = 161432039 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161432057) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 22891 + ... + 29100.

It is an arithmetic number, because the mean of its divisors is an integer number (9358560).

Almost surely, 2^161432055 is an apocalyptic number.

161432055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

161432055 is a deficient number, since it is larger than the sum of its proper divisors (138041865).

161432055 is a wasteful number, since it uses less digits than its factorization.

161432055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52028 (or 52022 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 161432055 is about 12705.5914856413. The cubic root of 161432055 is about 544.4983797355.

The spelling of 161432055 in words is "one hundred sixty-one million, four hundred thirty-two thousand, fifty-five".