165316540 has 48 divisors (see below), whose sum is σ = 355658688. Its totient is φ = 64523264.

The previous prime is 165316519. The next prime is 165316577. The reversal of 165316540 is 45613561.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 278484 + ... + 279076.

It is an arithmetic number, because the mean of its divisors is an integer number (7409556).

Almost surely, 2^165316540 is an apocalyptic number.

165316540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165316540 is an abundant number, since it is smaller than the sum of its proper divisors (190342148).

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

165316540 is a wasteful number, since it uses less digits than its factorization.

165316540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 918 (or 916 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 165316540 is about 12857.5479777444. The cubic root of 165316540 is about 548.8311707214.

The spelling of 165316540 in words is "one hundred sixty-five million, three hundred sixteen thousand, five hundred forty".