245875438217 has 2 divisors, whose sum is σ = 245875438218. Its totient is φ = 245875438216.

The previous prime is 245875438213. The next prime is 245875438261. The reversal of 245875438217 is 712834578542.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 158862827776 + 87012610441 = 398576^2 + 294979^2 .

It is a cyclic number.

It is not a de Polignac number, because 245875438217 - 2² = 245875438213 is a prime.

It is a super-2 number, since 2×245875438217² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (245875438213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122937719108 + 122937719109.

It is an arithmetic number, because the mean of its divisors is an integer number (122937719109).

Almost surely, 2^245875438217 is an apocalyptic number.

It is an amenable number.

245875438217 is a deficient number, since it is larger than the sum of its proper divisors (1).

245875438217 is an equidigital number, since it uses as much as digits as its factorization.

245875438217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15052800, while the sum is 56.

The spelling of 245875438217 in words is "two hundred forty-five billion, eight hundred seventy-five million, four hundred thirty-eight thousand, two hundred seventeen".