243431221432 has 32 divisors (see below), whose sum is σ = 521867293920. Its totient is φ = 104281873920.

The previous prime is 243431221409. The next prime is 243431221441. The reversal of 243431221432 is 234122134342.

243431221432 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×243431221432² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 243431221394 and 243431221403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 825133 + ... + 1080604.

It is an arithmetic number, because the mean of its divisors is an integer number (16308352935).

Almost surely, 2^243431221432 is an apocalyptic number.

It is an amenable number.

243431221432 is an abundant number, since it is smaller than the sum of its proper divisors (278436072488).

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

243431221432 is a wasteful number, since it uses less digits than its factorization.

243431221432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1908031 (or 1908027 counting only the distinct ones).

The product of its digits is 27648, while the sum is 31.

Adding to 243431221432 its reverse (234122134342), we get a palindrome (477553355774).

The spelling of 243431221432 in words is "two hundred forty-three billion, four hundred thirty-one million, two hundred twenty-one thousand, four hundred thirty-two".