3115212745 has 4 divisors (see below), whose sum is σ = 3738255300. Its totient is φ = 2492170192.

The previous prime is 3115212733. The next prime is 3115212761. The reversal of 3115212745 is 5472125113.

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 582305161 + 2532907584 = 24131^2 + 50328^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3115212745 is a prime.

It is a super-2 number, since 2×3115212745² = 19409100893220870050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 311521270 + ... + 311521279.

It is an arithmetic number, because the mean of its divisors is an integer number (934563825).

Almost surely, 2^3115212745 is an apocalyptic number.

It is an amenable number.

3115212745 is a deficient number, since it is larger than the sum of its proper divisors (623042555).

3115212745 is an equidigital number, since it uses as much as digits as its factorization.

3115212745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 623042554.

The product of its digits is 8400, while the sum is 31.

The square root of 3115212745 is about 55814.0909179752. The cubic root of 3115212745 is about 1460.4809738597.

Adding to 3115212745 its reverse (5472125113), we get a palindrome (8587337858).

The spelling of 3115212745 in words is "three billion, one hundred fifteen million, two hundred twelve thousand, seven hundred forty-five".