553370221 has 2 divisors, whose sum is σ = 553370222. Its totient is φ = 553370220.

The previous prime is 553370203. The next prime is 553370267. The reversal of 553370221 is 122073355.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 551780100 + 1590121 = 23490^2 + 1261^2 .

It is a cyclic number.

It is not a de Polignac number, because 553370221 - 2⁵ = 553370189 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 553370221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (553370201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 276685110 + 276685111.

It is an arithmetic number, because the mean of its divisors is an integer number (276685111).

Almost surely, 2^553370221 is an apocalyptic number.

It is an amenable number.

553370221 is a deficient number, since it is larger than the sum of its proper divisors (1).

553370221 is an equidigital number, since it uses as much as digits as its factorization.

553370221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6300, while the sum is 28.

The square root of 553370221 is about 23523.8224147352. The cubic root of 553370221 is about 820.9913753104.

The spelling of 553370221 in words is "five hundred fifty-three million, three hundred seventy thousand, two hundred twenty-one".