245315531173 has 2 divisors, whose sum is σ = 245315531174. Its totient is φ = 245315531172.

The previous prime is 245315531143. The next prime is 245315531207. The reversal of 245315531173 is 371135513542.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 189400780804 + 55914750369 = 435202^2 + 236463^2 .

It is a cyclic number.

It is not a de Polignac number, because 245315531173 - 2⁵ = 245315531141 is a prime.

It is a super-2 number, since 2×245315531173² (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 (245315531113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122657765586 + 122657765587.

It is an arithmetic number, because the mean of its divisors is an integer number (122657765587).

Almost surely, 2^245315531173 is an apocalyptic number.

It is an amenable number.

245315531173 is a deficient number, since it is larger than the sum of its proper divisors (1).

245315531173 is an equidigital number, since it uses as much as digits as its factorization.

245315531173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 189000, while the sum is 40.

The spelling of 245315531173 in words is "two hundred forty-five billion, three hundred fifteen million, five hundred thirty-one thousand, one hundred seventy-three".