245145553 has 2 divisors, whose sum is σ = 245145554. Its totient is φ = 245145552.

The previous prime is 245145547. The next prime is 245145577. The reversal of 245145553 is 355541542.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 205291584 + 39853969 = 14328^2 + 6313^2 .

It is a cyclic number.

It is not a de Polignac number, because 245145553 - 2⁹ = 245145041 is a prime.

It is not a weakly prime, because it can be changed into another prime (245145503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122572776 + 122572777.

It is an arithmetic number, because the mean of its divisors is an integer number (122572777).

Almost surely, 2^245145553 is an apocalyptic number.

It is an amenable number.

245145553 is a deficient number, since it is larger than the sum of its proper divisors (1).

245145553 is an equidigital number, since it uses as much as digits as its factorization.

245145553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60000, while the sum is 34.

The square root of 245145553 is about 15657.1246721740. The cubic root of 245145553 is about 625.8563646474.

The spelling of 245145553 in words is "two hundred forty-five million, one hundred forty-five thousand, five hundred fifty-three".