2031815245 has 4 divisors (see below), whose sum is σ = 2438178300. Its totient is φ = 1625452192.

The previous prime is 2031815243. The next prime is 2031815257. The reversal of 2031815245 is 5425181302.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 748241316 + 1283573929 = 27354^2 + 35827^2 .

It is a cyclic number.

It is not a de Polignac number, because 2031815245 - 2¹ = 2031815243 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2031815243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 203181520 + ... + 203181529.

It is an arithmetic number, because the mean of its divisors is an integer number (609544575).

Almost surely, 2^2031815245 is an apocalyptic number.

It is an amenable number.

2031815245 is a deficient number, since it is larger than the sum of its proper divisors (406363055).

2031815245 is an equidigital number, since it uses as much as digits as its factorization.

2031815245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406363054.

The product of its (nonzero) digits is 9600, while the sum is 31.

The square root of 2031815245 is about 45075.6613373559. The cubic root of 2031815245 is about 1266.5667173751.

Adding to 2031815245 its reverse (5425181302), we get a palindrome (7456996547).

The spelling of 2031815245 in words is "two billion, thirty-one million, eight hundred fifteen thousand, two hundred forty-five".