165221294 has 32 divisors (see below), whose sum is σ = 296593920. Its totient is φ = 67529952.

The previous prime is 165221293. The next prime is 165221333. The reversal of 165221294 is 492122561.

It is a self number, because there is not a number n which added to its sum of digits gives 165221294.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165221293) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31247 + ... + 36149.

It is an arithmetic number, because the mean of its divisors is an integer number (9268560).

Almost surely, 2^165221294 is an apocalyptic number.

165221294 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

165221294 is a deficient number, since it is larger than the sum of its proper divisors (131372626).

165221294 is a wasteful number, since it uses less digits than its factorization.

165221294 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5024.

The product of its digits is 8640, while the sum is 32.

The square root of 165221294 is about 12853.8435496936. The cubic root of 165221294 is about 548.7257486909.

The spelling of 165221294 in words is "one hundred sixty-five million, two hundred twenty-one thousand, two hundred ninety-four".