2571212645 has 16 divisors (see below), whose sum is σ = 3194262000. Its totient is φ = 1984539648.

The previous prime is 2571212599. The next prime is 2571212653. The reversal of 2571212645 is 5462121752.

It can be written as a sum of positive squares in 8 ways, for example, as 216148804 + 2355063841 = 14702^2 + 48529^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2571212645 is a prime.

It is a super-2 number, since 2×2571212645² = 13222268931615792050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 209951 + ... + 221859.

It is an arithmetic number, because the mean of its divisors is an integer number (199641375).

Almost surely, 2^2571212645 is an apocalyptic number.

It is an amenable number.

2571212645 is a deficient number, since it is larger than the sum of its proper divisors (623049355).

2571212645 is a wasteful number, since it uses less digits than its factorization.

2571212645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13432.

The product of its digits is 33600, while the sum is 35.

The square root of 2571212645 is about 50707.1261757162. The cubic root of 2571212645 is about 1369.9750728055.

The spelling of 2571212645 in words is "two billion, five hundred seventy-one million, two hundred twelve thousand, six hundred forty-five".