2165261343527 has 2 divisors, whose sum is σ = 2165261343528. Its totient is φ = 2165261343526.

The previous prime is 2165261343493. The next prime is 2165261343541. The reversal of 2165261343527 is 7253431625612.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2165261343527 - 2¹⁸ = 2165261081383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2165261343547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1082630671763 + 1082630671764.

It is an arithmetic number, because the mean of its divisors is an integer number (1082630671764).

Almost surely, 2^{2165261343527} is an apocalyptic number.

2165261343527 is a deficient number, since it is larger than the sum of its proper divisors (1).

2165261343527 is an equidigital number, since it uses as much as digits as its factorization.

2165261343527 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1814400, while the sum is 47.

The spelling of 2165261343527 in words is "two trillion, one hundred sixty-five billion, two hundred sixty-one million, three hundred forty-three thousand, five hundred twenty-seven".