553720243 has 18 divisors (see below), whose sum is σ = 597688476. Its totient is φ = 512875584.

The previous prime is 553720217. The next prime is 553720247. The reversal of 553720243 is 342027355.

It is not a de Polignac number, because 553720243 - 2²¹ = 551623091 is a prime.

It is a super-2 number, since 2×553720243² = 613212215015958098, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (553720247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1803496 + ... + 1803802.

Almost surely, 2^553720243 is an apocalyptic number.

553720243 is a deficient number, since it is larger than the sum of its proper divisors (43968233).

553720243 is an equidigital number, since it uses as much as digits as its factorization.

553720243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499 (or 403 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 31.

The square root of 553720243 is about 23531.2609734370. The cubic root of 553720243 is about 821.1644387586.

Adding to 553720243 its reverse (342027355), we get a palindrome (895747598).

The spelling of 553720243 in words is "five hundred fifty-three million, seven hundred twenty thousand, two hundred forty-three".