2521420416 has 96 divisors (see below), whose sum is σ = 7682512500. Its totient is φ = 791027712.

The previous prime is 2521420409. The next prime is 2521420423. The reversal of 2521420416 is 6140241252.

It is an interprime number because it is at equal distance from previous prime (2521420409) and next prime (2521420423).

It can be written as a sum of positive squares in 2 ways, for example, as 2489610816 + 31809600 = 49896^2 + 5640^2 .

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×2521420416² = 12715121828443226112, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2521420416.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44791 + ... + 83958.

Almost surely, 2^2521420416 is an apocalyptic number.

It is an amenable number.

2521420416 is an abundant number, since it is smaller than the sum of its proper divisors (5161092084).

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

2521420416 is a wasteful number, since it uses less digits than its factorization.

2521420416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128786 (or 128771 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 2521420416 is about 50213.7472809987. The cubic root of 2521420416 is about 1361.0740535089.

Adding to 2521420416 its reverse (6140241252), we get a palindrome (8661661668).

The spelling of 2521420416 in words is "two billion, five hundred twenty-one million, four hundred twenty thousand, four hundred sixteen".