55421333947 has 16 divisors (see below), whose sum is σ = 66750035200. Its totient is φ = 44951306400.

The previous prime is 55421333921. The next prime is 55421333951. The reversal of 55421333947 is 74933312455.

It is a de Polignac number, because none of the positive numbers 2^k-55421333947 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55421333897 and 55421333906.

It is not an unprimeable number, because it can be changed into a prime (55421331947) 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, 128304 + ... + 356797.

It is an arithmetic number, because the mean of its divisors is an integer number (4171877200).

Almost surely, 2^55421333947 is an apocalyptic number.

55421333947 is a deficient number, since it is larger than the sum of its proper divisors (11328701253).

55421333947 is a wasteful number, since it uses less digits than its factorization.

55421333947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485986.

The product of its digits is 1360800, while the sum is 46.

The spelling of 55421333947 in words is "fifty-five billion, four hundred twenty-one million, three hundred thirty-three thousand, nine hundred forty-seven".