2135521964 has 12 divisors (see below), whose sum is σ = 3737493984. Its totient is φ = 1067666544.

The previous prime is 2135521957. The next prime is 2135522041. The reversal of 2135521964 is 4691255312.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60797 + ... + 89259.

It is an arithmetic number, because the mean of its divisors is an integer number (311457832).

Almost surely, 2^2135521964 is an apocalyptic number.

It is an amenable number.

2135521964 is a deficient number, since it is larger than the sum of its proper divisors (1601972020).

2135521964 is a wasteful number, since it uses less digits than its factorization.

2135521964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47224 (or 47222 counting only the distinct ones).

The product of its digits is 64800, while the sum is 38.

The square root of 2135521964 is about 46211.7080835582. The cubic root of 2135521964 is about 1287.7592581123.

The spelling of 2135521964 in words is "two billion, one hundred thirty-five million, five hundred twenty-one thousand, nine hundred sixty-four".