553744421 has 2 divisors, whose sum is σ = 553744422. Its totient is φ = 553744420.

The previous prime is 553744381. The next prime is 553744427. The reversal of 553744421 is 124447355.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 553660900 + 83521 = 23530^2 + 289^2 .

It is a cyclic number.

It is not a de Polignac number, because 553744421 - 2¹⁴ = 553728037 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (553744427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 276872210 + 276872211.

It is an arithmetic number, because the mean of its divisors is an integer number (276872211).

Almost surely, 2^553744421 is an apocalyptic number.

It is an amenable number.

553744421 is a deficient number, since it is larger than the sum of its proper divisors (1).

553744421 is an equidigital number, since it uses as much as digits as its factorization.

553744421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 67200, while the sum is 35.

The square root of 553744421 is about 23531.7747099533. The cubic root of 553744421 is about 821.1763905369.

It can be divided in two parts, 55374 and 4421, that added together give a palindrome (59795).

The spelling of 553744421 in words is "five hundred fifty-three million, seven hundred forty-four thousand, four hundred twenty-one".