2521403340 has 24 divisors (see below), whose sum is σ = 7059929520. Its totient is φ = 672374208.

The previous prime is 2521403329. The next prime is 2521403351. The reversal of 2521403340 is 433041252.

2521403340 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2521403329) and next prime (2521403351).

It is a self number, because there is not a number n which added to its sum of digits gives 2521403340.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21011635 + ... + 21011754.

It is an arithmetic number, because the mean of its divisors is an integer number (294163730).

Almost surely, 2^2521403340 is an apocalyptic number.

2521403340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2521403340 is an abundant number, since it is smaller than the sum of its proper divisors (4538526180).

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

2521403340 is a wasteful number, since it uses less digits than its factorization.

2521403340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42023401 (or 42023399 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 2521403340 is about 50213.5772475931. The cubic root of 2521403340 is about 1361.0709809348.

Adding to 2521403340 its reverse (433041252), we get a palindrome (2954444592).

The spelling of 2521403340 in words is "two billion, five hundred twenty-one million, four hundred three thousand, three hundred forty".