55035550021 has 4 divisors (see below), whose sum is σ = 55050913792. Its totient is φ = 55020186252.

The previous prime is 55035550019. The next prime is 55035550061. The reversal of 55035550021 is 12005553055.

It is a happy number.

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 55035550021 - 2¹ = 55035550019 is a prime.

It is a super-2 number, since 2×55035550021² (a number of 22 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 (55035550061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7676511 + ... + 7683676.

It is an arithmetic number, because the mean of its divisors is an integer number (13762728448).

Almost surely, 2^55035550021 is an apocalyptic number.

It is an amenable number.

55035550021 is a deficient number, since it is larger than the sum of its proper divisors (15363771).

55035550021 is a wasteful number, since it uses less digits than its factorization.

55035550021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15363770.

The product of its (nonzero) digits is 18750, while the sum is 31.

The spelling of 55035550021 in words is "fifty-five billion, thirty-five million, five hundred fifty thousand, twenty-one".