550021541 has 4 divisors (see below), whose sum is σ = 559344000. Its totient is φ = 540699084.

The previous prime is 550021531. The next prime is 550021543. The reversal of 550021541 is 145120055.

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 a de Polignac number, because none of the positive numbers 2^k-550021541 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 (550021543) 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, 4661141 + ... + 4661258.

It is an arithmetic number, because the mean of its divisors is an integer number (139836000).

Almost surely, 2^550021541 is an apocalyptic number.

It is an amenable number.

550021541 is a deficient number, since it is larger than the sum of its proper divisors (9322459).

550021541 is an equidigital number, since it uses as much as digits as its factorization.

550021541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9322458.

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 550021541 is about 23452.5380502836. The cubic root of 550021541 is about 819.3319668243.

Adding to 550021541 its reverse (145120055), we get a palindrome (695141596).

The spelling of 550021541 in words is "five hundred fifty million, twenty-one thousand, five hundred forty-one".