2135456520 has 64 divisors (see below), whose sum is σ = 6409419840. Its totient is φ = 569184000.

The previous prime is 2135456509. The next prime is 2135456537. The reversal of 2135456520 is 256545312.

It is a Cunningham number, because it is equal to 46211²-1.

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, 459810 + ... + 464430.

It is an arithmetic number, because the mean of its divisors is an integer number (100147185).

Almost surely, 2^2135456520 is an apocalyptic number.

2135456520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2135456520 is an abundant number, since it is smaller than the sum of its proper divisors (4273963320).

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

2135456520 is a wasteful number, since it uses less digits than its factorization.

2135456520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8486 (or 8482 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 33.

The square root of 2135456520 is about 46210.9999891801. Note that the first 4 decimals coincide. The cubic root of 2135456520 is about 1287.7461033303.

The spelling of 2135456520 in words is "two billion, one hundred thirty-five million, four hundred fifty-six thousand, five hundred twenty".