165145427 has 2 divisors, whose sum is σ = 165145428. Its totient is φ = 165145426.

The previous prime is 165145423. The next prime is 165145433. The reversal of 165145427 is 724541561.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 165145427 - 2² = 165145423 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (165145423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82572713 + 82572714.

It is an arithmetic number, because the mean of its divisors is an integer number (82572714).

Almost surely, 2^165145427 is an apocalyptic number.

165145427 is a deficient number, since it is larger than the sum of its proper divisors (1).

165145427 is an equidigital number, since it uses as much as digits as its factorization.

165145427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 33600, while the sum is 35.

The square root of 165145427 is about 12850.8920702028. The cubic root of 165145427 is about 548.6417471094.

Adding to 165145427 its reverse (724541561), we get a palindrome (889686988).

The spelling of 165145427 in words is "one hundred sixty-five million, one hundred forty-five thousand, four hundred twenty-seven".