245430517 has 2 divisors, whose sum is σ = 245430518. Its totient is φ = 245430516.

The previous prime is 245430487. The next prime is 245430533. The reversal of 245430517 is 715034542.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 126315121 + 119115396 = 11239^2 + 10914^2 .

It is a cyclic number.

It is not a de Polignac number, because 245430517 - 2²⁷ = 111212789 is a prime.

It is a super-2 number, since 2×245430517² = 120472277349774578, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (245430557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122715258 + 122715259.

It is an arithmetic number, because the mean of its divisors is an integer number (122715259).

Almost surely, 2^245430517 is an apocalyptic number.

It is an amenable number.

245430517 is a deficient number, since it is larger than the sum of its proper divisors (1).

245430517 is an equidigital number, since it uses as much as digits as its factorization.

245430517 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16800, while the sum is 31.

The square root of 245430517 is about 15666.2221674531. Note that the first 3 decimals coincide. The cubic root of 245430517 is about 626.0987750175.

The spelling of 245430517 in words is "two hundred forty-five million, four hundred thirty thousand, five hundred seventeen".