165221126 has 8 divisors (see below), whose sum is σ = 283236240. Its totient is φ = 70809048.

The previous prime is 165221107. The next prime is 165221171. The reversal of 165221126 is 621122561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 165221095 and 165221104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5900741 + ... + 5900768.

It is an arithmetic number, because the mean of its divisors is an integer number (35404530).

Almost surely, 2^165221126 is an apocalyptic number.

165221126 is a deficient number, since it is larger than the sum of its proper divisors (118015114).

165221126 is a wasteful number, since it uses less digits than its factorization.

165221126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11801518.

The product of its digits is 1440, while the sum is 26.

The square root of 165221126 is about 12853.8370146816. The cubic root of 165221126 is about 548.7255627061.

Adding to 165221126 its reverse (621122561), we get a palindrome (786343687).

The spelling of 165221126 in words is "one hundred sixty-five million, two hundred twenty-one thousand, one hundred twenty-six".