243155054505 has 24 divisors (see below), whose sum is σ = 427631371776. Its totient is φ = 117893358880.

The previous prime is 243155054503. The next prime is 243155054509. The reversal of 243155054505 is 505450551342.

It is not a de Polignac number, because 243155054505 - 2¹ = 243155054503 is a prime.

It is not an unprimeable number, because it can be changed into a prime (243155054503) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 66983049 + ... + 66986678.

It is an arithmetic number, because the mean of its divisors is an integer number (17817973824).

Almost surely, 2^243155054505 is an apocalyptic number.

It is an amenable number.

243155054505 is a deficient number, since it is larger than the sum of its proper divisors (184476317271).

243155054505 is a wasteful number, since it uses less digits than its factorization.

243155054505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133969757 (or 133969746 counting only the distinct ones).

The product of its (nonzero) digits is 300000, while the sum is 39.

The spelling of 243155054505 in words is "two hundred forty-three billion, one hundred fifty-five million, fifty-four thousand, five hundred five".