553553521 has 4 divisors (see below), whose sum is σ = 553814692. Its totient is φ = 553292352.

The previous prime is 553553519. The next prime is 553553527. The reversal of 553553521 is 125355355.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 125355355 = 5 ⋅25071071.

It can be written as a sum of positive squares in 2 ways, for example, as 91776400 + 461777121 = 9580^2 + 21489^2 .

It is a cyclic number.

It is not a de Polignac number, because 553553521 - 2¹ = 553553519 is a prime.

It is a super-2 number, since 2×553553521² = 612843001222994882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (553553527) 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, 127380 + ... + 131653.

It is an arithmetic number, because the mean of its divisors is an integer number (138453673).

Almost surely, 2^553553521 is an apocalyptic number.

It is an amenable number.

553553521 is a deficient number, since it is larger than the sum of its proper divisors (261171).

553553521 is a wasteful number, since it uses less digits than its factorization.

553553521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261170.

The product of its digits is 56250, while the sum is 34.

The square root of 553553521 is about 23527.7181426504. The cubic root of 553553521 is about 821.0820145127.

The spelling of 553553521 in words is "five hundred fifty-three million, five hundred fifty-three thousand, five hundred twenty-one".