165671520 has 96 divisors (see below), whose sum is σ = 596429568. Its totient is φ = 37867008.

The previous prime is 165671509. The next prime is 165671521. The reversal of 165671520 is 25176561.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×165671520² = 54894105078220800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165671521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21294 + ... + 28013.

It is an arithmetic number, because the mean of its divisors is an integer number (6212808).

Almost surely, 2^165671520 is an apocalyptic number.

165671520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165671520 is an abundant number, since it is smaller than the sum of its proper divisors (430758048).

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

165671520 is a wasteful number, since it uses less digits than its factorization.

165671520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49332 (or 49324 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 33.

The square root of 165671520 is about 12871.3449180729. The cubic root of 165671520 is about 549.2237202876.

The spelling of 165671520 in words is "one hundred sixty-five million, six hundred seventy-one thousand, five hundred twenty".