253143521 has 2 divisors, whose sum is σ = 253143522. Its totient is φ = 253143520.

The previous prime is 253143509. The next prime is 253143533. The reversal of 253143521 is 125341352.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (253143509) and next prime (253143533).

It can be written as a sum of positive squares in only one way, i.e., 220195921 + 32947600 = 14839^2 + 5740^2 .

It is a cyclic number.

It is not a de Polignac number, because 253143521 - 2¹⁴ = 253127137 is a prime.

It is not a weakly prime, because it can be changed into another prime (253173521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126571760 + 126571761.

It is an arithmetic number, because the mean of its divisors is an integer number (126571761).

Almost surely, 2^253143521 is an apocalyptic number.

It is an amenable number.

253143521 is a deficient number, since it is larger than the sum of its proper divisors (1).

253143521 is an equidigital number, since it uses as much as digits as its factorization.

253143521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3600, while the sum is 26.

The square root of 253143521 is about 15910.4846249258. The cubic root of 253143521 is about 632.5899269619.

Adding to 253143521 its reverse (125341352), we get a palindrome (378484873).

The spelling of 253143521 in words is "two hundred fifty-three million, one hundred forty-three thousand, five hundred twenty-one".