165572212 has 24 divisors (see below), whose sum is σ = 317932776. Its totient is φ = 74974848.

The previous prime is 165572203. The next prime is 165572221. The reversal of 165572212 is 212275561.

It is an interprime number because it is at equal distance from previous prime (165572203) and next prime (165572221).

It can be written as a sum of positive squares in 4 ways, for example, as 10719076 + 154853136 = 3274^2 + 12444^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27283 + ... + 32794.

It is an arithmetic number, because the mean of its divisors is an integer number (13247199).

Almost surely, 2^165572212 is an apocalyptic number.

It is an amenable number.

165572212 is a deficient number, since it is larger than the sum of its proper divisors (152360564).

165572212 is a wasteful number, since it uses less digits than its factorization.

165572212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60147 (or 60145 counting only the distinct ones).

The product of its digits is 8400, while the sum is 31.

The square root of 165572212 is about 12867.4866232687. The cubic root of 165572212 is about 549.1139584913.

It can be divided in two parts, 16557 and 2212, that added together give a square (18769 = 137²).

The spelling of 165572212 in words is "one hundred sixty-five million, five hundred seventy-two thousand, two hundred twelve".