243210040420 has 24 divisors (see below), whose sum is σ = 513161667648. Its totient is φ = 96822952800.

The previous prime is 243210040391. The next prime is 243210040421. The reversal of 243210040420 is 24040012342.

It is a happy number.

It is a super-2 number, since 2×243210040420² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 243210040391 and 243210040400.

It is not an unprimeable number, because it can be changed into a prime (243210040421) 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, 28812136 + ... + 28820575.

It is an arithmetic number, because the mean of its divisors is an integer number (21381736152).

Almost surely, 2^243210040420 is an apocalyptic number.

243210040420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243210040420 is an abundant number, since it is smaller than the sum of its proper divisors (269951627228).

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

243210040420 is a wasteful number, since it uses less digits than its factorization.

243210040420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57632931 (or 57632929 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 243210040420 its reverse (24040012342), we get a palindrome (267250052762).

The spelling of 243210040420 in words is "two hundred forty-three billion, two hundred ten million, forty thousand, four hundred twenty".