243401133 has 32 divisors (see below), whose sum is σ = 346268160. Its totient is φ = 151856640.

The previous prime is 243401129. The next prime is 243401141. The reversal of 243401133 is 331104342.

It is not a de Polignac number, because 243401133 - 2² = 243401129 is a prime.

It is a super-2 number, since 2×243401133² = 118488223091367378, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243401143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 359191 + ... + 359867.

It is an arithmetic number, because the mean of its divisors is an integer number (10820880).

Almost surely, 2^243401133 is an apocalyptic number.

It is an amenable number.

243401133 is a deficient number, since it is larger than the sum of its proper divisors (102867027).

243401133 is a wasteful number, since it uses less digits than its factorization.

243401133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 837.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 243401133 is about 15601.3183096814. The cubic root of 243401133 is about 624.3683286278.

Adding to 243401133 its reverse (331104342), we get a palindrome (574505475).

The spelling of 243401133 in words is "two hundred forty-three million, four hundred one thousand, one hundred thirty-three".