165151361 has 4 divisors (see below), whose sum is σ = 165528000. Its totient is φ = 164774724.

The previous prime is 165151319. The next prime is 165151411. The reversal of 165151361 is 163151561.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165151361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165151061) 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, 187661 + ... + 188538.

It is an arithmetic number, because the mean of its divisors is an integer number (41382000).

Almost surely, 2^165151361 is an apocalyptic number.

It is an amenable number.

165151361 is a deficient number, since it is larger than the sum of its proper divisors (376639).

165151361 is an equidigital number, since it uses as much as digits as its factorization.

165151361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376638.

The product of its digits is 2700, while the sum is 29.

The square root of 165151361 is about 12851.1229470424. The cubic root of 165151361 is about 548.6483182897.

The spelling of 165151361 in words is "one hundred sixty-five million, one hundred fifty-one thousand, three hundred sixty-one".