431644221342 has 12 divisors (see below), whose sum is σ = 935229146280. Its totient is φ = 143881407108.

The previous prime is 431644221331. The next prime is 431644221377. The reversal of 431644221342 is 243122446134.

431644221342 is a `hidden beast` number, since 4 + 3 + 1 + 644 + 2 + 2 + 1 + 3 + 4 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 431644221297 and 431644221306.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11990117242 + ... + 11990117277.

It is an arithmetic number, because the mean of its divisors is an integer number (77935762190).

Almost surely, 2^431644221342 is an apocalyptic number.

431644221342 is an abundant number, since it is smaller than the sum of its proper divisors (503584924938).

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

431644221342 is a wasteful number, since it uses less digits than its factorization.

431644221342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23980234527 (or 23980234524 counting only the distinct ones).

The product of its digits is 110592, while the sum is 36.

Adding to 431644221342 its reverse (243122446134), we get a palindrome (674766667476).

The spelling of 431644221342 in words is "four hundred thirty-one billion, six hundred forty-four million, two hundred twenty-one thousand, three hundred forty-two".