165620022 has 16 divisors (see below), whose sum is σ = 331376832. Its totient is φ = 55183880.

The previous prime is 165620003. The next prime is 165620023. The reversal of 165620022 is 220026561.

It is a junction number, because it is equal to n+sod(n) for n = 165619974 and 165620001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165620023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16993 + ... + 24899.

It is an arithmetic number, because the mean of its divisors is an integer number (20711052).

Almost surely, 2^165620022 is an apocalyptic number.

165620022 is an abundant number, since it is smaller than the sum of its proper divisors (165756810).

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

165620022 is a wasteful number, since it uses less digits than its factorization.

165620022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11403.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 165620022 is about 12869.3442723396. The cubic root of 165620022 is about 549.1668067551.

Adding to 165620022 its reverse (220026561), we get a palindrome (385646583).

The spelling of 165620022 in words is "one hundred sixty-five million, six hundred twenty thousand, twenty-two".