243400421352 has 64 divisors (see below), whose sum is σ = 668595110400. Its totient is φ = 73227061440.

The previous prime is 243400421269. The next prime is 243400421359. The reversal of 243400421352 is 253124004342.

It is a super-2 number, since 2×243400421352² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (243400421359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3279748 + ... + 3353139.

It is an arithmetic number, because the mean of its divisors is an integer number (10446798600).

Almost surely, 2^243400421352 is an apocalyptic number.

243400421352 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

243400421352 is an abundant number, since it is smaller than the sum of its proper divisors (425194689048).

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

243400421352 is a wasteful number, since it uses less digits than its factorization.

243400421352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6633046 (or 6633042 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 30.

Adding to 243400421352 its reverse (253124004342), we get a palindrome (496524425694).

The spelling of 243400421352 in words is "two hundred forty-three billion, four hundred million, four hundred twenty-one thousand, three hundred fifty-two".