2521873440 has 192 divisors, whose sum is σ = 8936766720. Its totient is φ = 672406272.

The previous prime is 2521873427. The next prime is 2521873441. The reversal of 2521873440 is 443781252.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 2521873395 and 2521873404.

It is not an unprimeable number, because it can be changed into a prime (2521873441) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 346317 + ... + 353523.

It is an arithmetic number, because the mean of its divisors is an integer number (46545660).

Almost surely, 2^2521873440 is an apocalyptic number.

2521873440 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 2521873440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4468383360).

2521873440 is an abundant number, since it is smaller than the sum of its proper divisors (6414893280).

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

2521873440 is an frugal number, since it uses more digits than its factorization.

2521873440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7243 (or 7217 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

The square root of 2521873440 is about 50218.2580343046. The cubic root of 2521873440 is about 1361.1555634234.

The spelling of 2521873440 in words is "two billion, five hundred twenty-one million, eight hundred seventy-three thousand, four hundred forty".