550202421 has 4 divisors (see below), whose sum is σ = 733603232. Its totient is φ = 366801612.

The previous prime is 550202417. The next prime is 550202423. The reversal of 550202421 is 124202055.

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 not a de Polignac number, because 550202421 - 2² = 550202417 is a prime.

It is a super-2 number, since 2×550202421² = 605445408148522482, which 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 (550202423) 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, 91700401 + ... + 91700406.

It is an arithmetic number, because the mean of its divisors is an integer number (183400808).

Almost surely, 2^550202421 is an apocalyptic number.

It is an amenable number.

550202421 is a deficient number, since it is larger than the sum of its proper divisors (183400811).

550202421 is a wasteful number, since it uses less digits than its factorization.

550202421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183400810.

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 550202421 is about 23456.3940323316. The cubic root of 550202421 is about 819.4217721091.

Adding to 550202421 its reverse (124202055), we get a palindrome (674404476).

The spelling of 550202421 in words is "five hundred fifty million, two hundred two thousand, four hundred twenty-one".