243488655 has 24 divisors (see below), whose sum is σ = 422472960. Its totient is φ = 129729600.

The previous prime is 243488617. The next prime is 243488657. The reversal of 243488655 is 556884342.

It is not a de Polignac number, because 243488655 - 2¹² = 243484559 is a prime.

It is a super-2 number, since 2×243488655² = 118573450227418050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 243488655.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243488657) 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, 56466 + ... + 60624.

It is an arithmetic number, because the mean of its divisors is an integer number (17603040).

Almost surely, 2^243488655 is an apocalyptic number.

243488655 is a deficient number, since it is larger than the sum of its proper divisors (178984305).

243488655 is a wasteful number, since it uses less digits than its factorization.

243488655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5471 (or 5468 counting only the distinct ones).

The product of its digits is 921600, while the sum is 45.

The square root of 243488655 is about 15604.1230128450. The cubic root of 243488655 is about 624.4431562941.

The spelling of 243488655 in words is "two hundred forty-three million, four hundred eighty-eight thousand, six hundred fifty-five".