2521420403 has 8 divisors (see below), whose sum is σ = 2654643600. Its totient is φ = 2388248928.

The previous prime is 2521420367. The next prime is 2521420409. The reversal of 2521420403 is 3040241252.

It is a happy number.

2521420403 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2521420403 - 2⁶ = 2521420339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2521420409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124925 + ... + 143697.

It is an arithmetic number, because the mean of its divisors is an integer number (331830450).

Almost surely, 2^2521420403 is an apocalyptic number.

2521420403 is a deficient number, since it is larger than the sum of its proper divisors (133223197).

2521420403 is a wasteful number, since it uses less digits than its factorization.

2521420403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25861.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 2521420403 is about 50213.7471515520. The cubic root of 2521420403 is about 1361.0740511697.

Adding to 2521420403 its reverse (3040241252), we get a palindrome (5561661655).

The spelling of 2521420403 in words is "two billion, five hundred twenty-one million, four hundred twenty thousand, four hundred three".