2516305421 has 8 divisors (see below), whose sum is σ = 2905425600. Its totient is φ = 2134597248.

The previous prime is 2516305349. The next prime is 2516305459. The reversal of 2516305421 is 1245036152.

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

It is a de Polignac number, because none of the positive numbers 2^k-2516305421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2516305921) 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, 1852271 + ... + 1853628.

It is an arithmetic number, because the mean of its divisors is an integer number (363178200).

Almost surely, 2^2516305421 is an apocalyptic number.

It is an amenable number.

2516305421 is a deficient number, since it is larger than the sum of its proper divisors (389120179).

2516305421 is an equidigital number, since it uses as much as digits as its factorization.

2516305421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3706003.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 2516305421 is about 50162.7892067417. The cubic root of 2516305421 is about 1360.1530646999.

The spelling of 2516305421 in words is "two billion, five hundred sixteen million, three hundred five thousand, four hundred twenty-one".