165251141 has 4 divisors (see below), whose sum is σ = 180273984. Its totient is φ = 150228300.

The previous prime is 165251137. The next prime is 165251171. The reversal of 165251141 is 141152561.

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, and also an emirpimes, since its reverse is a distinct semiprime: 141152561 = 11 ⋅12832051.

It is a cyclic number.

It is not a de Polignac number, because 165251141 - 2² = 165251137 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 165251141.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165251131) 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, 7511405 + ... + 7511426.

It is an arithmetic number, because the mean of its divisors is an integer number (45068496).

Almost surely, 2^165251141 is an apocalyptic number.

165251141 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

165251141 is a deficient number, since it is larger than the sum of its proper divisors (15022843).

165251141 is a wasteful number, since it uses less digits than its factorization.

165251141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15022842.

The product of its digits is 1200, while the sum is 26.

The square root of 165251141 is about 12855.0045118623. The cubic root of 165251141 is about 548.7587888859.

The spelling of 165251141 in words is "one hundred sixty-five million, two hundred fifty-one thousand, one hundred forty-one".