243655155 has 32 divisors (see below), whose sum is σ = 434649600. Its totient is φ = 129504096.

The previous prime is 243655121. The next prime is 243655193. The reversal of 243655155 is 551556342.

243655155 is a `hidden beast` number, since 24 + 36 + 551 + 55 = 666.

It is not a de Polignac number, because 243655155 - 2⁶ = 243655091 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38506 + ... + 44384.

It is an arithmetic number, because the mean of its divisors is an integer number (13582800).

Almost surely, 2^243655155 is an apocalyptic number.

243655155 is a deficient number, since it is larger than the sum of its proper divisors (190994445).

243655155 is a wasteful number, since it uses less digits than its factorization.

243655155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6200 (or 6194 counting only the distinct ones).

The product of its digits is 90000, while the sum is 36.

The square root of 243655155 is about 15609.4572295131. The cubic root of 243655155 is about 624.5854573745.

The spelling of 243655155 in words is "two hundred forty-three million, six hundred fifty-five thousand, one hundred fifty-five".