50553021 has 4 divisors (see below), whose sum is σ = 67404032. Its totient is φ = 33702012.

The previous prime is 50553017. The next prime is 50553047. The reversal of 50553021 is 12035505.

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 50553021 - 2² = 50553017 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 (50553221) 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, 8425501 + ... + 8425506.

It is an arithmetic number, because the mean of its divisors is an integer number (16851008).

Almost surely, 2^50553021 is an apocalyptic number.

It is an amenable number.

50553021 is a deficient number, since it is larger than the sum of its proper divisors (16851011).

50553021 is a wasteful number, since it uses less digits than its factorization.

50553021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16851010.

The product of its (nonzero) digits is 750, while the sum is 21.

The square root of 50553021 is about 7110.0647676375. The cubic root of 50553021 is about 369.7564040618.

Adding to 50553021 its reverse (12035505), we get a palindrome (62588526).

The spelling of 50553021 in words is "fifty million, five hundred fifty-three thousand, twenty-one".