55421443521253 has 4 divisors (see below), whose sum is σ = 55475198559648. Its totient is φ = 55367688482860.

The previous prime is 55421443521251. The next prime is 55421443521293. The reversal of 55421443521253 is 35212534412455.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 55421443521253 - 2¹ = 55421443521251 is a prime.

It is a super-2 number, since 2×55421443521253² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 26877517651 + ... + 26877519712.

It is an arithmetic number, because the mean of its divisors is an integer number (13868799639912).

Almost surely, 2^{55421443521253} is an apocalyptic number.

It is an amenable number.

55421443521253 is a deficient number, since it is larger than the sum of its proper divisors (53755038395).

55421443521253 is a wasteful number, since it uses less digits than its factorization.

55421443521253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53755038394.

The product of its digits is 2880000, while the sum is 46.

The spelling of 55421443521253 in words is "fifty-five trillion, four hundred twenty-one billion, four hundred forty-three million, five hundred twenty-one thousand, two hundred fifty-three".