165424151 has 4 divisors (see below), whose sum is σ = 169895112. Its totient is φ = 160953192.

The previous prime is 165424117. The next prime is 165424159. The reversal of 165424151 is 151424561.

165424151 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 165424151 - 2¹⁸ = 165162007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165424159) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2235425 + ... + 2235498.

It is an arithmetic number, because the mean of its divisors is an integer number (42473778).

Almost surely, 2^165424151 is an apocalyptic number.

165424151 is a deficient number, since it is larger than the sum of its proper divisors (4470961).

165424151 is an equidigital number, since it uses as much as digits as its factorization.

165424151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4470960.

The product of its digits is 4800, while the sum is 29.

The square root of 165424151 is about 12861.7320373269. The cubic root of 165424151 is about 548.9502301147.

The spelling of 165424151 in words is "one hundred sixty-five million, four hundred twenty-four thousand, one hundred fifty-one".