55033028421 has 32 divisors (see below), whose sum is σ = 86356512000. Its totient is φ = 31158872640.

The previous prime is 55033028419. The next prime is 55033028459. The reversal of 55033028421 is 12482033055.

55033028421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 55033028421 - 2¹ = 55033028419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55033028321) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 133170 + ... + 357491.

It is an arithmetic number, because the mean of its divisors is an integer number (2698641000).

Almost surely, 2^55033028421 is an apocalyptic number.

It is an amenable number.

55033028421 is a deficient number, since it is larger than the sum of its proper divisors (31323483579).

55033028421 is a wasteful number, since it uses less digits than its factorization.

55033028421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490794 (or 490780 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 33.

The spelling of 55033028421 in words is "fifty-five billion, thirty-three million, twenty-eight thousand, four hundred twenty-one".