245557057 has 2 divisors, whose sum is σ = 245557058. Its totient is φ = 245557056.

The previous prime is 245557009. The next prime is 245557073. The reversal of 245557057 is 750755542.

245557057 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 244891201 + 665856 = 15649^2 + 816^2 .

It is a cyclic number.

It is not a de Polignac number, because 245557057 - 2²⁷ = 111339329 is a prime.

It is not a weakly prime, because it can be changed into another prime (245557087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122778528 + 122778529.

It is an arithmetic number, because the mean of its divisors is an integer number (122778529).

Almost surely, 2^245557057 is an apocalyptic number.

It is an amenable number.

245557057 is a deficient number, since it is larger than the sum of its proper divisors (1).

245557057 is an equidigital number, since it uses as much as digits as its factorization.

245557057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 245000, while the sum is 40.

The square root of 245557057 is about 15670.2602722482. The cubic root of 245557057 is about 626.2063586599.

The spelling of 245557057 in words is "two hundred forty-five million, five hundred fifty-seven thousand, fifty-seven".