553755221 has 2 divisors, whose sum is σ = 553755222. Its totient is φ = 553755220.

The previous prime is 553755217. The next prime is 553755253. The reversal of 553755221 is 122557355.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 533379025 + 20376196 = 23095^2 + 4514^2 .

It is a cyclic number.

It is not a de Polignac number, because 553755221 - 2² = 553755217 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (553755211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 276877610 + 276877611.

It is an arithmetic number, because the mean of its divisors is an integer number (276877611).

Almost surely, 2^553755221 is an apocalyptic number.

It is an amenable number.

553755221 is a deficient number, since it is larger than the sum of its proper divisors (1).

553755221 is an equidigital number, since it uses as much as digits as its factorization.

553755221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52500, while the sum is 35.

The square root of 553755221 is about 23532.0041857892. The cubic root of 553755221 is about 821.1817291294.

The spelling of 553755221 in words is "five hundred fifty-three million, seven hundred fifty-five thousand, two hundred twenty-one".