2003013522 has 56 divisors (see below), whose sum is σ = 4521675420. Its totient is φ = 665159040.

The previous prime is 2003013521. The next prime is 2003013527. The reversal of 2003013522 is 2253103002.

It can be written as a sum of positive squares in 2 ways, for example, as 1929757041 + 73256481 = 43929^2 + 8559^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 2003013495 and 2003013504.

It is not an unprimeable number, because it can be changed into a prime (2003013521) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 407254 + ... + 412142.

Almost surely, 2^2003013522 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2003013522, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2260837710).

2003013522 is an abundant number, since it is smaller than the sum of its proper divisors (2518661898).

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

2003013522 is an equidigital number, since it uses as much as digits as its factorization.

2003013522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5190 (or 5175 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 2003013522 is about 44755.0390682435. The cubic root of 2003013522 is about 1260.5535323016.

Adding to 2003013522 its reverse (2253103002), we get a palindrome (4256116524).

The spelling of 2003013522 in words is "two billion, three million, thirteen thousand, five hundred twenty-two".