553163621 has 2 divisors, whose sum is σ = 553163622. Its totient is φ = 553163620.

The previous prime is 553163617. The next prime is 553163623. The reversal of 553163621 is 126361355.

553163621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 341140900 + 212022721 = 18470^2 + 14561^2 .

It is a cyclic number.

It is not a de Polignac number, because 553163621 - 2² = 553163617 is a prime.

Together with 553163623, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (553163623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 276581810 + 276581811.

It is an arithmetic number, because the mean of its divisors is an integer number (276581811).

Almost surely, 2^553163621 is an apocalyptic number.

It is an amenable number.

553163621 is a deficient number, since it is larger than the sum of its proper divisors (1).

553163621 is an equidigital number, since it uses as much as digits as its factorization.

553163621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16200, while the sum is 32.

The square root of 553163621 is about 23519.4307116478. The cubic root of 553163621 is about 820.8891905976.

The spelling of 553163621 in words is "five hundred fifty-three million, one hundred sixty-three thousand, six hundred twenty-one".