243121243398 has 16 divisors (see below), whose sum is σ = 530446349376. Its totient is φ = 73673104040.

The previous prime is 243121243397. The next prime is 243121243447. The reversal of 243121243398 is 893342121342.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243121243397) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1841827536 + ... + 1841827667.

It is an arithmetic number, because the mean of its divisors is an integer number (33152896836).

Almost surely, 2^243121243398 is an apocalyptic number.

243121243398 is an abundant number, since it is smaller than the sum of its proper divisors (287325105978).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

243121243398 is a wasteful number, since it uses less digits than its factorization.

243121243398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3683655219.

The product of its digits is 248832, while the sum is 42.

The spelling of 243121243398 in words is "two hundred forty-three billion, one hundred twenty-one million, two hundred forty-three thousand, three hundred ninety-eight".