55421421232 has 20 divisors (see below), whose sum is σ = 107400664360. Its totient is φ = 27705120768.

The previous prime is 55421421199. The next prime is 55421421247. The reversal of 55421421232 is 23212412455.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 55421421194 and 55421421203.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 266982 + ... + 426757.

It is an arithmetic number, because the mean of its divisors is an integer number (5370033218).

Almost surely, 2^55421421232 is an apocalyptic number.

It is an amenable number.

55421421232 is a deficient number, since it is larger than the sum of its proper divisors (51979243128).

55421421232 is a wasteful number, since it uses less digits than its factorization.

55421421232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 698740 (or 698734 counting only the distinct ones).

The product of its digits is 19200, while the sum is 31.

Adding to 55421421232 its reverse (23212412455), we get a palindrome (78633833687).

The spelling of 55421421232 in words is "fifty-five billion, four hundred twenty-one million, four hundred twenty-one thousand, two hundred thirty-two".