55421443521252 has 36 divisors (see below), whose sum is σ = 143351072264400. Its totient is φ = 18044190913392.

The previous prime is 55421443521251. The next prime is 55421443521293. The reversal of 55421443521252 is 25212534412455.

55421443521252 is a `hidden beast` number, since 5 + 5 + 4 + 2 + 1 + 44 + 352 + 1 + 252 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a junction number, because it is equal to n+sod(n) for n = 55421443521198 and 55421443521207.

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 11 ways as a sum of consecutive naturals, for example, 17900981502 + ... + 17900984597.

Almost surely, 2^{55421443521252} is an apocalyptic number.

It is an amenable number.

55421443521252 is an abundant number, since it is smaller than the sum of its proper divisors (87929628743148).

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

55421443521252 is a wasteful number, since it uses less digits than its factorization.

55421443521252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35801966152 (or 35801966147 counting only the distinct ones).

The product of its digits is 1920000, while the sum is 45.

The spelling of 55421443521252 in words is "fifty-five trillion, four hundred twenty-one billion, four hundred forty-three million, five hundred twenty-one thousand, two hundred fifty-two".