55421443521250 has 20 divisors (see below), whose sum is σ = 103881953738574. Its totient is φ = 22168577408000.

The previous prime is 55421443521239. The next prime is 55421443521251. The reversal of 55421443521250 is 5212534412455.

It can be written as a sum of positive squares in 5 ways, for example, as 8106952147441 + 47314491373809 = 2847271^2 + 6878553^2 .

It is a junction number, because it is equal to n+sod(n) for n = 55421443521197 and 55421443521206.

It is not an unprimeable number, because it can be changed into a prime (55421443521251) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 22168576159 + ... + 22168578658.

Almost surely, 2^{55421443521250} is an apocalyptic number.

55421443521250 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55421443521250 is a deficient number, since it is larger than the sum of its proper divisors (48460510217324).

55421443521250 is an equidigital number, since it uses as much as digits as its factorization.

55421443521250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44337154839 (or 44337154824 counting only the distinct ones).

The product of its (nonzero) digits is 960000, while the sum is 43.

The spelling of 55421443521250 in words is "fifty-five trillion, four hundred twenty-one billion, four hundred forty-three million, five hundred twenty-one thousand, two hundred fifty".