243406055 has 12 divisors (see below), whose sum is σ = 308271672. Its totient is φ = 184474800.

The previous prime is 243405989. The next prime is 243406063. The reversal of 243406055 is 550604342.

It is not a de Polignac number, because 243406055 - 2¹⁶ = 243340519 is a prime.

It is a super-2 number, since 2×243406055² = 118493015221326050, which contains 22 as substring.

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 (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 65621 + ... + 69230.

It is an arithmetic number, because the mean of its divisors is an integer number (25689306).

Almost surely, 2^243406055 is an apocalyptic number.

243406055 is a deficient number, since it is larger than the sum of its proper divisors (64865617).

243406055 is a wasteful number, since it uses less digits than its factorization.

243406055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134894 (or 134875 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 29.

The square root of 243406055 is about 15601.4760519638. The cubic root of 243406055 is about 624.3725372089.

The spelling of 243406055 in words is "two hundred forty-three million, four hundred six thousand, fifty-five".