243240400029 has 32 divisors (see below), whose sum is σ = 368120246400. Its totient is φ = 141512188160.

The previous prime is 243240399989. The next prime is 243240400031. The reversal of 243240400029 is 920004042342.

It is a cyclic number.

It is not a de Polignac number, because 243240400029 - 2¹² = 243240395933 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 243240399969 and 243240400005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243240401029) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 569034 + ... + 900155.

It is an arithmetic number, because the mean of its divisors is an integer number (11503757700).

Almost surely, 2^243240400029 is an apocalyptic number.

243240400029 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

243240400029 is a deficient number, since it is larger than the sum of its proper divisors (124879846371).

243240400029 is a wasteful number, since it uses less digits than its factorization.

243240400029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1469405.

The product of its (nonzero) digits is 13824, while the sum is 30.

The spelling of 243240400029 in words is "two hundred forty-three billion, two hundred forty million, four hundred thousand, twenty-nine".