42553554021 has 24 divisors (see below), whose sum is σ = 69217125120. Its totient is φ = 24958094400.

The previous prime is 42553554019. The next prime is 42553554031. The reversal of 42553554021 is 12045535524.

42553554021 is a `hidden beast` number, since 42 + 5 + 53 + 5 + 540 + 21 = 666.

42553554021 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 42553554021 - 2¹ = 42553554019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42553554031) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6929736 + ... + 6935873.

It is an arithmetic number, because the mean of its divisors is an integer number (2884046880).

Almost surely, 2^42553554021 is an apocalyptic number.

It is an amenable number.

42553554021 is a deficient number, since it is larger than the sum of its proper divisors (26663571099).

42553554021 is a wasteful number, since it uses less digits than its factorization.

42553554021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13865657 (or 13865654 counting only the distinct ones).

The product of its (nonzero) digits is 120000, while the sum is 36.

The spelling of 42553554021 in words is "forty-two billion, five hundred fifty-three million, five hundred fifty-four thousand, twenty-one".