2535521820 has 48 divisors (see below), whose sum is σ = 7645575840. Its totient is φ = 624128256.

The previous prime is 2535521809. The next prime is 2535521927. The reversal of 2535521820 is 281255352.

2535521820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×2535521820² = 12857741799392224800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1624555 + ... + 1626114.

It is an arithmetic number, because the mean of its divisors is an integer number (159282830).

Almost surely, 2^2535521820 is an apocalyptic number.

2535521820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2535521820 is an abundant number, since it is smaller than the sum of its proper divisors (5110054020).

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

2535521820 is a wasteful number, since it uses less digits than its factorization.

2535521820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3250694 (or 3250692 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 33.

The square root of 2535521820 is about 50353.9652857647. The cubic root of 2535521820 is about 1363.6066717333.

The spelling of 2535521820 in words is "two billion, five hundred thirty-five million, five hundred twenty-one thousand, eight hundred twenty".