245315531205 has 56 divisors (see below), whose sum is σ = 467328877272. Its totient is φ = 123138745344.

The previous prime is 245315531173. The next prime is 245315531207. The reversal of 245315531205 is 502135513542.

245315531205 is a `hidden beast` number, since 2 + 453 + 155 + 31 + 20 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 56492257761 + 188823273444 = 237681^2 + 434538^2 .

It is not a de Polignac number, because 245315531205 - 2⁵ = 245315531173 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 245315531205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245315531207) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 1917504 + ... + 2041433.

Almost surely, 2^245315531205 is an apocalyptic number.

It is an amenable number.

245315531205 is a deficient number, since it is larger than the sum of its proper divisors (222013346067).

245315531205 is an equidigital number, since it uses as much as digits as its factorization.

245315531205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3958977 (or 3958962 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 36.

The spelling of 245315531205 in words is "two hundred forty-five billion, three hundred fifteen million, five hundred thirty-one thousand, two hundred five".