253745533 has 2 divisors, whose sum is σ = 253745534. Its totient is φ = 253745532.

The previous prime is 253745521. The next prime is 253745561. The reversal of 253745533 is 335547352.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 150479289 + 103266244 = 12267^2 + 10162^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-253745533 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 253745492 and 253745501.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (253745033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126872766 + 126872767.

It is an arithmetic number, because the mean of its divisors is an integer number (126872767).

Almost surely, 2^253745533 is an apocalyptic number.

It is an amenable number.

253745533 is a deficient number, since it is larger than the sum of its proper divisors (1).

253745533 is an equidigital number, since it uses as much as digits as its factorization.

253745533 is an evil number, because the sum of its binary digits is even.

The product of its digits is 189000, while the sum is 37.

The square root of 253745533 is about 15929.3921101842. The cubic root of 253745533 is about 633.0909934936.

The spelling of 253745533 in words is "two hundred fifty-three million, seven hundred forty-five thousand, five hundred thirty-three".