253021057 has 2 divisors, whose sum is σ = 253021058. Its totient is φ = 253021056.

The previous prime is 253021051. The next prime is 253021063. The reversal of 253021057 is 750120352.

It is a balanced prime because it is at equal distance from previous prime (253021051) and next prime (253021063).

It can be written as a sum of positive squares in only one way, i.e., 247086961 + 5934096 = 15719^2 + 2436^2 .

It is a cyclic number.

It is not a de Polignac number, because 253021057 - 2³ = 253021049 is a prime.

It is not a weakly prime, because it can be changed into another prime (253021051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126510528 + 126510529.

It is an arithmetic number, because the mean of its divisors is an integer number (126510529).

Almost surely, 2^253021057 is an apocalyptic number.

It is an amenable number.

253021057 is a deficient number, since it is larger than the sum of its proper divisors (1).

253021057 is an equidigital number, since it uses as much as digits as its factorization.

253021057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2100, while the sum is 25.

The square root of 253021057 is about 15906.6356279384. The cubic root of 253021057 is about 632.4879005325.

The spelling of 253021057 in words is "two hundred fifty-three million, twenty-one thousand, fifty-seven".