165081451 has 2 divisors, whose sum is σ = 165081452. Its totient is φ = 165081450.

The previous prime is 165081401. The next prime is 165081463. The reversal of 165081451 is 154180561.

It is a strong prime.

It is an emirp because it is prime and its reverse (154180561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 165081451 - 2¹¹ = 165079403 is a prime.

It is not a weakly prime, because it can be changed into another prime (165081401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82540725 + 82540726.

It is an arithmetic number, because the mean of its divisors is an integer number (82540726).

Almost surely, 2^165081451 is an apocalyptic number.

165081451 is a deficient number, since it is larger than the sum of its proper divisors (1).

165081451 is an equidigital number, since it uses as much as digits as its factorization.

165081451 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4800, while the sum is 31.

The square root of 165081451 is about 12848.4026633664. The cubic root of 165081451 is about 548.5708915035.

The spelling of 165081451 in words is "one hundred sixty-five million, eighty-one thousand, four hundred fifty-one".