243400255105 has 128 divisors (see below), whose sum is σ = 374492160000. Its totient is φ = 151100006400.

The previous prime is 243400255099. The next prime is 243400255141. The reversal of 243400255105 is 501552004342.

It is not a de Polignac number, because 243400255105 - 2¹⁵ = 243400222337 is a prime.

It is a super-2 number, since 2×243400255105² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 404991805 + ... + 404992405.

It is an arithmetic number, because the mean of its divisors is an integer number (2925720000).

Almost surely, 2^243400255105 is an apocalyptic number.

It is an amenable number.

243400255105 is a deficient number, since it is larger than the sum of its proper divisors (131091904895).

243400255105 is a wasteful number, since it uses less digits than its factorization.

243400255105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1152 (or 1138 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 31.

Adding to 243400255105 its reverse (501552004342), we get a palindrome (744952259447).

The spelling of 243400255105 in words is "two hundred forty-three billion, four hundred million, two hundred fifty-five thousand, one hundred five".