2521111040 has 160 divisors (see below), whose sum is σ = 6947233920. Its totient is φ = 859521024.

The previous prime is 2521111039. The next prime is 2521111091. The reversal of 2521111040 is 401111252.

It is a tau number, because it is divible by the number of its divisors (160).

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, 4820219 + ... + 4820741.

It is an arithmetic number, because the mean of its divisors is an integer number (43420212).

Almost surely, 2^2521111040 is an apocalyptic number.

2521111040 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 2521111040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3473616960).

2521111040 is an abundant number, since it is smaller than the sum of its proper divisors (4426122880).

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

2521111040 is an equidigital number, since it uses as much as digits as its factorization.

2521111040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 822 (or 806 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 2521111040 is about 50210.6665958539. Note that the first 3 decimals coincide. The cubic root of 2521111040 is about 1361.0183837143.

Adding to 2521111040 its reverse (401111252), we get a palindrome (2922222292).

The spelling of 2521111040 in words is "two billion, five hundred twenty-one million, one hundred eleven thousand, forty".