2015443140 has 48 divisors (see below), whose sum is σ = 5693200128. Its totient is φ = 532693504.

The previous prime is 2015443139. The next prime is 2015443159. The reversal of 2015443140 is 413445102.

It is a super-2 number, since 2×2015443140² = 8124022101146119200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2015443140.

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, 141852 + ... + 155411.

It is an arithmetic number, because the mean of its divisors is an integer number (118608336).

Almost surely, 2^2015443140 is an apocalyptic number.

2015443140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2015443140 is an abundant number, since it is smaller than the sum of its proper divisors (3677756988).

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

2015443140 is a wasteful number, since it uses less digits than its factorization.

2015443140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297388 (or 297386 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 2015443140 is about 44893.6870840433. The cubic root of 2015443140 is about 1263.1555950634.

Adding to 2015443140 its reverse (413445102), we get a palindrome (2428888242).

The spelling of 2015443140 in words is "two billion, fifteen million, four hundred forty-three thousand, one hundred forty".