2571215663 has 2 divisors, whose sum is σ = 2571215664. Its totient is φ = 2571215662.

The previous prime is 2571215639. The next prime is 2571215683. The reversal of 2571215663 is 3665121752.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2571215663 - 2¹² = 2571211567 is a prime.

It is a super-2 number, since 2×2571215663² = 13222299971313059138, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2571215683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1285607831 + 1285607832.

It is an arithmetic number, because the mean of its divisors is an integer number (1285607832).

Almost surely, 2^2571215663 is an apocalyptic number.

2571215663 is a deficient number, since it is larger than the sum of its proper divisors (1).

2571215663 is an equidigital number, since it uses as much as digits as its factorization.

2571215663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 75600, while the sum is 38.

The square root of 2571215663 is about 50707.1559348382. The cubic root of 2571215663 is about 1369.9756088150.

The spelling of 2571215663 in words is "two billion, five hundred seventy-one million, two hundred fifteen thousand, six hundred sixty-three".