2133581904 has 80 divisors (see below), whose sum is σ = 6130232640. Its totient is φ = 710490240.

The previous prime is 2133581899. The next prime is 2133581911. The reversal of 2133581904 is 4091853312.

2133581904 is a `hidden beast` number, since 213 + 358 + 1 + 90 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 614734 + ... + 618194.

It is an arithmetic number, because the mean of its divisors is an integer number (76627908).

Almost surely, 2^2133581904 is an apocalyptic number.

2133581904 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2133581904 is an abundant number, since it is smaller than the sum of its proper divisors (3996650736).

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

2133581904 is a wasteful number, since it uses less digits than its factorization.

2133581904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4905 (or 4893 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 2133581904 is about 46190.7123131913. The cubic root of 2133581904 is about 1287.3691759366.

The spelling of 2133581904 in words is "two billion, one hundred thirty-three million, five hundred eighty-one thousand, nine hundred four".