2152566817 has 2 divisors, whose sum is σ = 2152566818. Its totient is φ = 2152566816.

The previous prime is 2152566781. The next prime is 2152566851. The reversal of 2152566817 is 7186652512.

Together with previous prime (2152566781) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2147766336 + 4800481 = 46344^2 + 2191^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2152566817 is a prime.

It is a super-2 number, since 2×2152566817² = 9267087803299022978, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2152566887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1076283408 + 1076283409.

It is an arithmetic number, because the mean of its divisors is an integer number (1076283409).

Almost surely, 2^2152566817 is an apocalyptic number.

It is an amenable number.

2152566817 is a deficient number, since it is larger than the sum of its proper divisors (1).

2152566817 is an equidigital number, since it uses as much as digits as its factorization.

2152566817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 201600, while the sum is 43.

The square root of 2152566817 is about 46395.7629207668. The cubic root of 2152566817 is about 1291.1763036058.

The spelling of 2152566817 in words is "two billion, one hundred fifty-two million, five hundred sixty-six thousand, eight hundred seventeen".