2016213540 has 96 divisors (see below), whose sum is σ = 6308910720. Its totient is φ = 476851200.

The previous prime is 2016213539. The next prime is 2016213547. The reversal of 2016213540 is 453126102.

It is a self number, because there is not a number n which added to its sum of digits gives 2016213540.

It is not an unprimeable number, because it can be changed into a prime (2016213547) 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, 10195 + ... + 64314.

It is an arithmetic number, because the mean of its divisors is an integer number (65717820).

Almost surely, 2^2016213540 is an apocalyptic number.

2016213540 is a gapful number since it is divisible by the number (20) 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 2016213540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3154455360).

2016213540 is an abundant number, since it is smaller than the sum of its proper divisors (4292697180).

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

2016213540 is a wasteful number, since it uses less digits than its factorization.

2016213540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74573 (or 74571 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 2016213540 is about 44902.2665352207. The cubic root of 2016213540 is about 1263.3165209800.

Adding to 2016213540 its reverse (453126102), we get a palindrome (2469339642).

The spelling of 2016213540 in words is "two billion, sixteen million, two hundred thirteen thousand, five hundred forty".