165620530 has 16 divisors (see below), whose sum is σ = 313807680. Its totient is φ = 62761392.

The previous prime is 165620519. The next prime is 165620561. The reversal of 165620530 is 35026561.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 435654 + ... + 436033.

It is an arithmetic number, because the mean of its divisors is an integer number (19612980).

Almost surely, 2^165620530 is an apocalyptic number.

165620530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

165620530 is a deficient number, since it is larger than the sum of its proper divisors (148187150).

165620530 is a wasteful number, since it uses less digits than its factorization.

165620530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 871713.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 165620530 is about 12869.3640091498. The cubic root of 165620530 is about 549.1673682341.

The spelling of 165620530 in words is "one hundred sixty-five million, six hundred twenty thousand, five hundred thirty".