245173513157 has 2 divisors, whose sum is σ = 245173513158. Its totient is φ = 245173513156.

The previous prime is 245173513153. The next prime is 245173513177. The reversal of 245173513157 is 751315371542.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 223174987396 + 21998525761 = 472414^2 + 148319^2 .

It is a cyclic number.

It is not a de Polignac number, because 245173513157 - 2² = 245173513153 is a prime.

It is a super-2 number, since 2×245173513157² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (245173513153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122586756578 + 122586756579.

It is an arithmetic number, because the mean of its divisors is an integer number (122586756579).

Almost surely, 2^245173513157 is an apocalyptic number.

It is an amenable number.

245173513157 is a deficient number, since it is larger than the sum of its proper divisors (1).

245173513157 is an equidigital number, since it uses as much as digits as its factorization.

245173513157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 441000, while the sum is 44.

Adding to 245173513157 its reverse (751315371542), we get a palindrome (996488884699).

The spelling of 245173513157 in words is "two hundred forty-five billion, one hundred seventy-three million, five hundred thirteen thousand, one hundred fifty-seven".