165167220 has 24 divisors (see below), whose sum is σ = 462468384. Its totient is φ = 44044576.

The previous prime is 165167201. The next prime is 165167221. The reversal of 165167220 is 22761561.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165167221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1376334 + ... + 1376453.

It is an arithmetic number, because the mean of its divisors is an integer number (19269516).

Almost surely, 2^165167220 is an apocalyptic number.

165167220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165167220 is an abundant number, since it is smaller than the sum of its proper divisors (297301164).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

165167220 is a wasteful number, since it uses less digits than its factorization.

165167220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2752799 (or 2752797 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 165167220 is about 12851.7399600210. The cubic root of 165167220 is about 548.6658794230.

The spelling of 165167220 in words is "one hundred sixty-five million, one hundred sixty-seven thousand, two hundred twenty".