2521404651 has 4 divisors (see below), whose sum is σ = 3361872872. Its totient is φ = 1680936432.

The previous prime is 2521404649. The next prime is 2521404653. The reversal of 2521404651 is 1564041252.

2521404651 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (2521404649) and next prime (2521404653).

It is not a de Polignac number, because 2521404651 - 2¹ = 2521404649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2521404653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 420234106 + ... + 420234111.

It is an arithmetic number, because the mean of its divisors is an integer number (840468218).

Almost surely, 2^2521404651 is an apocalyptic number.

2521404651 is a deficient number, since it is larger than the sum of its proper divisors (840468221).

2521404651 is an equidigital number, since it uses as much as digits as its factorization.

2521404651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 840468220.

The product of its (nonzero) digits is 9600, while the sum is 30.

The square root of 2521404651 is about 50213.5903018296. The cubic root of 2521404651 is about 1361.0712168304.

The spelling of 2521404651 in words is "two billion, five hundred twenty-one million, four hundred four thousand, six hundred fifty-one".