2521040424 has 128 divisors (see below), whose sum is σ = 7312343040. Its totient is φ = 709454592.

The previous prime is 2521040413. The next prime is 2521040443. The reversal of 2521040424 is 4240401252.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 2521040394 and 2521040403.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3690787 + ... + 3691469.

It is an arithmetic number, because the mean of its divisors is an integer number (57127680).

Almost surely, 2^2521040424 is an apocalyptic number.

2521040424 is a gapful number since it is divisible by the number (24) 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 2521040424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3656171520).

2521040424 is an abundant number, since it is smaller than the sum of its proper divisors (4791302616).

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

2521040424 is a wasteful number, since it uses less digits than its factorization.

2521040424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 999 (or 995 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 24.

The square root of 2521040424 is about 50209.9633937329. The cubic root of 2521040424 is about 1361.0056762783.

Adding to 2521040424 its reverse (4240401252), we get a palindrome (6761441676).

The spelling of 2521040424 in words is "two billion, five hundred twenty-one million, forty thousand, four hundred twenty-four".