553221231 has 16 divisors (see below), whose sum is σ = 770259456. Its totient is φ = 352522016.

The previous prime is 553221223. The next prime is 553221239. The reversal of 553221231 is 132122355.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (553221223) and next prime (553221239).

It is a cyclic number.

It is not a de Polignac number, because 553221231 - 2³ = 553221223 is a prime.

It is a super-2 number, since 2×553221231² = 612107460858310722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (553221239) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 150886 + ... + 154508.

It is an arithmetic number, because the mean of its divisors is an integer number (48141216).

Almost surely, 2^553221231 is an apocalyptic number.

553221231 is a deficient number, since it is larger than the sum of its proper divisors (217038225).

553221231 is a wasteful number, since it uses less digits than its factorization.

553221231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5862.

The product of its digits is 1800, while the sum is 24.

The square root of 553221231 is about 23520.6554117865. The cubic root of 553221231 is about 820.9176871599.

Adding to 553221231 its reverse (132122355), we get a palindrome (685343586).

The spelling of 553221231 in words is "five hundred fifty-three million, two hundred twenty-one thousand, two hundred thirty-one".