2523221440 has 112 divisors (see below), whose sum is σ = 6472488960. Its totient is φ = 934179840.

The previous prime is 2523221431. The next prime is 2523221453. The reversal of 2523221440 is 441223252.

It is a congruent number.

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, 222631 + ... + 233689.

It is an arithmetic number, because the mean of its divisors is an integer number (57790080).

Almost surely, 2^2523221440 is an apocalyptic number.

2523221440 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 2523221440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3236244480).

2523221440 is an abundant number, since it is smaller than the sum of its proper divisors (3949267520).

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

2523221440 is a wasteful number, since it uses less digits than its factorization.

2523221440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11130 (or 11120 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 2523221440 is about 50231.6776546434. The cubic root of 2523221440 is about 1361.3980433256.

Adding to 2523221440 its reverse (441223252), we get a palindrome (2964444692).

The spelling of 2523221440 in words is "two billion, five hundred twenty-three million, two hundred twenty-one thousand, four hundred forty".