2571215684 has 12 divisors (see below), whose sum is σ = 4500662544. Its totient is φ = 1285312104.

The previous prime is 2571215683. The next prime is 2571215741. The reversal of 2571215684 is 4865121752.

It is a super-2 number, since 2×2571215684² = 13222300187295175712, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2571215683) 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, 53762 + ... + 89625.

It is an arithmetic number, because the mean of its divisors is an integer number (375055212).

Almost surely, 2^2571215684 is an apocalyptic number.

It is an amenable number.

2571215684 is a deficient number, since it is larger than the sum of its proper divisors (1929446860).

2571215684 is a wasteful number, since it uses less digits than its factorization.

2571215684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147874 (or 147872 counting only the distinct ones).

The product of its digits is 134400, while the sum is 41.

The square root of 2571215684 is about 50707.1561419096. The cubic root of 2571215684 is about 1369.9756125447.

The spelling of 2571215684 in words is "two billion, five hundred seventy-one million, two hundred fifteen thousand, six hundred eighty-four".