52015550421 has 4 divisors (see below), whose sum is σ = 69354067232. Its totient is φ = 34677033612.

The previous prime is 52015550407. The next prime is 52015550449. The reversal of 52015550421 is 12405551025.

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 not a de Polignac number, because 52015550421 - 2¹⁷ = 52015419349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52015550021) 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, 8669258401 + ... + 8669258406.

It is an arithmetic number, because the mean of its divisors is an integer number (17338516808).

Almost surely, 2^52015550421 is an apocalyptic number.

It is an amenable number.

52015550421 is a deficient number, since it is larger than the sum of its proper divisors (17338516811).

52015550421 is a wasteful number, since it uses less digits than its factorization.

52015550421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17338516810.

The product of its (nonzero) digits is 10000, while the sum is 30.

The spelling of 52015550421 in words is "fifty-two billion, fifteen million, five hundred fifty thousand, four hundred twenty-one".