245288557 has 2 divisors, whose sum is σ = 245288558. Its totient is φ = 245288556.

The previous prime is 245288521. The next prime is 245288573. The reversal of 245288557 is 755882542.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 207907561 + 37380996 = 14419^2 + 6114^2 .

It is a cyclic number.

It is not a de Polignac number, because 245288557 - 2²⁷ = 111070829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (245288357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122644278 + 122644279.

It is an arithmetic number, because the mean of its divisors is an integer number (122644279).

Almost surely, 2^245288557 is an apocalyptic number.

It is an amenable number.

245288557 is a deficient number, since it is larger than the sum of its proper divisors (1).

245288557 is an equidigital number, since it uses as much as digits as its factorization.

245288557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 896000, while the sum is 46.

The square root of 245288557 is about 15661.6907452548. The cubic root of 245288557 is about 625.9780373504.

The spelling of 245288557 in words is "two hundred forty-five million, two hundred eighty-eight thousand, five hundred fifty-seven".