165215077 has 2 divisors, whose sum is σ = 165215078. Its totient is φ = 165215076.

The previous prime is 165215053. The next prime is 165215087. The reversal of 165215077 is 770512561.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86378436 + 78836641 = 9294^2 + 8879^2 .

It is a cyclic number.

It is not a de Polignac number, because 165215077 - 2⁷ = 165214949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165215087) 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, 82607538 + 82607539.

It is an arithmetic number, because the mean of its divisors is an integer number (82607539).

Almost surely, 2^165215077 is an apocalyptic number.

It is an amenable number.

165215077 is a deficient number, since it is larger than the sum of its proper divisors (1).

165215077 is an equidigital number, since it uses as much as digits as its factorization.

165215077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14700, while the sum is 34.

The square root of 165215077 is about 12853.6017131386. The cubic root of 165215077 is about 548.7188660615.

The spelling of 165215077 in words is "one hundred sixty-five million, two hundred fifteen thousand, seventy-seven".