245311553 has 2 divisors, whose sum is σ = 245311554. Its totient is φ = 245311552.

The previous prime is 245311543. The next prime is 245311567. The reversal of 245311553 is 355113542.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 243890689 + 1420864 = 15617^2 + 1192^2 .

It is a cyclic number.

It is not a de Polignac number, because 245311553 - 2¹² = 245307457 is a prime.

It is not a weakly prime, because it can be changed into another prime (245311523) 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, 122655776 + 122655777.

It is an arithmetic number, because the mean of its divisors is an integer number (122655777).

Almost surely, 2^245311553 is an apocalyptic number.

It is an amenable number.

245311553 is a deficient number, since it is larger than the sum of its proper divisors (1).

245311553 is an equidigital number, since it uses as much as digits as its factorization.

245311553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9000, while the sum is 29.

The square root of 245311553 is about 15662.4248761167. The cubic root of 245311553 is about 625.9975987210.

The spelling of 245311553 in words is "two hundred forty-five million, three hundred eleven thousand, five hundred fifty-three".