253221019 has 2 divisors, whose sum is σ = 253221020. Its totient is φ = 253221018.

The previous prime is 253220983. The next prime is 253221047. The reversal of 253221019 is 910122352.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 253221019 - 2¹¹ = 253218971 is a prime.

It is a super-2 number, since 2×253221019² = 128241768926796722, which contains 22 as substring.

It is a zygodrome in base 11.

It is a junction number, because it is equal to n+sod(n) for n = 253220984 and 253221002.

It is not a weakly prime, because it can be changed into another prime (253221049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126610509 + 126610510.

It is an arithmetic number, because the mean of its divisors is an integer number (126610510).

Almost surely, 2^253221019 is an apocalyptic number.

253221019 is a deficient number, since it is larger than the sum of its proper divisors (1).

253221019 is an equidigital number, since it uses as much as digits as its factorization.

253221019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 253221019 is about 15912.9198766286. The cubic root of 253221019 is about 632.6544746040.

The spelling of 253221019 in words is "two hundred fifty-three million, two hundred twenty-one thousand, nineteen".