165222550 has 12 divisors (see below), whose sum is σ = 307314036. Its totient is φ = 66089000.

The previous prime is 165222523. The next prime is 165222553. The reversal of 165222550 is 55222561.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165222553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1652176 + ... + 1652275.

It is an arithmetic number, because the mean of its divisors is an integer number (25609503).

Almost surely, 2^165222550 is an apocalyptic number.

165222550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

165222550 is a deficient number, since it is larger than the sum of its proper divisors (142091486).

165222550 is a wasteful number, since it uses less digits than its factorization.

165222550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3304463 (or 3304458 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 165222550 is about 12853.8924065825. The cubic root of 165222550 is about 548.7271391448.

The spelling of 165222550 in words is "one hundred sixty-five million, two hundred twenty-two thousand, five hundred fifty".