243400101 has 48 divisors (see below), whose sum is σ = 402750144. Its totient is φ = 129916416.

The previous prime is 243400057. The next prime is 243400109. The reversal of 243400101 is 101004342.

It is not a de Polignac number, because 243400101 - 2⁷ = 243399973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243400109) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 432046 + ... + 432608.

It is an arithmetic number, because the mean of its divisors is an integer number (8390628).

Almost surely, 2^243400101 is an apocalyptic number.

243400101 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

243400101 is a deficient number, since it is larger than the sum of its proper divisors (159350043).

243400101 is a wasteful number, since it uses less digits than its factorization.

243400101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 770 (or 763 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 243400101 is about 15601.2852355183. The cubic root of 243400101 is about 624.3674462038.

Adding to 243400101 its reverse (101004342), we get a palindrome (344404443).

The spelling of 243400101 in words is "two hundred forty-three million, four hundred thousand, one hundred one".