165221283 has 32 divisors (see below), whose sum is σ = 247242240. Its totient is φ = 97528320.

The previous prime is 165221281. The next prime is 165221293. The reversal of 165221283 is 382122561.

165221283 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 165221283 - 2¹ = 165221281 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 165221283.

It is not an unprimeable number, because it can be changed into a prime (165221281) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 161313 + ... + 162333.

It is an arithmetic number, because the mean of its divisors is an integer number (7726320).

Almost surely, 2^165221283 is an apocalyptic number.

165221283 is a deficient number, since it is larger than the sum of its proper divisors (82020957).

165221283 is a wasteful number, since it uses less digits than its factorization.

165221283 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1227.

The product of its digits is 5760, while the sum is 30.

The square root of 165221283 is about 12853.8431218060. The cubic root of 165221283 is about 548.7257365133.

The spelling of 165221283 in words is "one hundred sixty-five million, two hundred twenty-one thousand, two hundred eighty-three".