165015240 has 128 divisors (see below), whose sum is σ = 537667200. Its totient is φ = 40273920.

The previous prime is 165015211. The next prime is 165015241. The reversal of 165015240 is 42510561.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 165015240.

It is not an unprimeable number, because it can be changed into a prime (165015241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 216460 + ... + 217220.

It is an arithmetic number, because the mean of its divisors is an integer number (4200525).

Almost surely, 2^165015240 is an apocalyptic number.

165015240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 165015240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (268833600).

165015240 is an abundant number, since it is smaller than the sum of its proper divisors (372651960).

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

165015240 is a wasteful number, since it uses less digits than its factorization.

165015240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 927 (or 923 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 165015240 is about 12845.8257811633. The cubic root of 165015240 is about 548.4975412793.

The spelling of 165015240 in words is "one hundred sixty-five million, fifteen thousand, two hundred forty".