243055806 has 32 divisors (see below), whose sum is σ = 557480448. Its totient is φ = 69204000.

The previous prime is 243055759. The next prime is 243055807. The reversal of 243055806 is 608550342.

It is a super-2 number, since 2×243055806² = 118152249660619272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243055807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2431 + ... + 22181.

It is an arithmetic number, because the mean of its divisors is an integer number (17421264).

Almost surely, 2^243055806 is an apocalyptic number.

243055806 is an abundant number, since it is smaller than the sum of its proper divisors (314424642).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

243055806 is a wasteful number, since it uses less digits than its factorization.

243055806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20056.

The product of its (nonzero) digits is 28800, while the sum is 33.

The square root of 243055806 is about 15590.2471436472. The cubic root of 243055806 is about 624.0729132830.

The spelling of 243055806 in words is "two hundred forty-three million, fifty-five thousand, eight hundred six".