553227021 has 12 divisors (see below), whose sum is σ = 799427772. Its totient is φ = 368669376.

The previous prime is 553227001. The next prime is 553227029. The reversal of 553227021 is 120722355.

553227021 is a `hidden beast` number, since 553 + 22 + 70 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 335988900 + 217238121 = 18330^2 + 14739^2 .

It is not a de Polignac number, because 553227021 - 2²¹ = 551129869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (553227029) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14185 + ... + 36161.

It is an arithmetic number, because the mean of its divisors is an integer number (66618981).

Almost surely, 2^553227021 is an apocalyptic number.

It is an amenable number.

553227021 is a deficient number, since it is larger than the sum of its proper divisors (246200751).

553227021 is a wasteful number, since it uses less digits than its factorization.

553227021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24780 (or 24777 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 553227021 is about 23520.7784947693. The cubic root of 553227021 is about 820.9205510514.

Adding to 553227021 its reverse (120722355), we get a palindrome (673949376).

The spelling of 553227021 in words is "five hundred fifty-three million, two hundred twenty-seven thousand, twenty-one".