553640443 has 4 divisors (see below), whose sum is σ = 557307088. Its totient is φ = 549973800.

The previous prime is 553640413. The next prime is 553640471. The reversal of 553640443 is 344046355.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 344046355 = 5 ⋅68809271.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-553640443 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 553640399 and 553640408.

It is not an unprimeable number, because it can be changed into a prime (553640413) 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, 1833096 + ... + 1833397.

It is an arithmetic number, because the mean of its divisors is an integer number (139326772).

Almost surely, 2^553640443 is an apocalyptic number.

553640443 is a deficient number, since it is larger than the sum of its proper divisors (3666645).

553640443 is a wasteful number, since it uses less digits than its factorization.

553640443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3666644.

The product of its (nonzero) digits is 86400, while the sum is 34.

The square root of 553640443 is about 23529.5652956020. The cubic root of 553640443 is about 821.1249891922.

Adding to 553640443 its reverse (344046355), we get a palindrome (897686798).

The spelling of 553640443 in words is "five hundred fifty-three million, six hundred forty thousand, four hundred forty-three".