245755513 has 2 divisors, whose sum is σ = 245755514. Its totient is φ = 245755512.

The previous prime is 245755501. The next prime is 245755547. The reversal of 245755513 is 315557542.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 174319209 + 71436304 = 13203^2 + 8452^2 .

It is a cyclic number.

It is not a de Polignac number, because 245755513 - 2²¹ = 243658361 is a prime.

It is equal to p_13459744 and since 245755513 and 13459744 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (245755583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122877756 + 122877757.

It is an arithmetic number, because the mean of its divisors is an integer number (122877757).

Almost surely, 2^245755513 is an apocalyptic number.

It is an amenable number.

245755513 is a deficient number, since it is larger than the sum of its proper divisors (1).

245755513 is an equidigital number, since it uses as much as digits as its factorization.

245755513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 105000, while the sum is 37.

The square root of 245755513 is about 15676.5912429967. The cubic root of 245755513 is about 626.3750104954.

It can be divided in two parts, 2457 and 55513, that added together give a triangular number (57970 = T₃₄₀).

The spelling of 245755513 in words is "two hundred forty-five million, seven hundred fifty-five thousand, five hundred thirteen".