165315450 has 96 divisors (see below), whose sum is σ = 424258560. Its totient is φ = 42577600.

The previous prime is 165315443. The next prime is 165315461. The reversal of 165315450 is 54513561.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 923461 + ... + 923639.

It is an arithmetic number, because the mean of its divisors is an integer number (4419360).

Almost surely, 2^165315450 is an apocalyptic number.

165315450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 165315450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (212129280).

165315450 is an abundant number, since it is smaller than the sum of its proper divisors (258943110).

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

165315450 is a wasteful number, since it uses less digits than its factorization.

165315450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372 (or 367 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 30.

The square root of 165315450 is about 12857.5055901213. The cubic root of 165315450 is about 548.8299644955.

It can be divided in two parts, 165 and 315450, that added together give a triangular number (315615 = T₇₉₄).

The spelling of 165315450 in words is "one hundred sixty-five million, three hundred fifteen thousand, four hundred fifty".