2133405256 has 8 divisors (see below), whose sum is σ = 4000134870. Its totient is φ = 1066702624.

The previous prime is 2133405233. The next prime is 2133405299. The reversal of 2133405256 is 6525043312.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1257837156 + 875568100 = 35466^2 + 29590^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133337821 + ... + 133337836.

Almost surely, 2^2133405256 is an apocalyptic number.

It is an amenable number.

2133405256 is a deficient number, since it is larger than the sum of its proper divisors (1866729614).

2133405256 is a wasteful number, since it uses less digits than its factorization.

2133405256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266675663 (or 266675659 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 31.

The square root of 2133405256 is about 46188.8001143134. The cubic root of 2133405256 is about 1287.3336460973. Note that the first 3 decimals are identical.

Adding to 2133405256 its reverse (6525043312), we get a palindrome (8658448568).

The spelling of 2133405256 in words is "two billion, one hundred thirty-three million, four hundred five thousand, two hundred fifty-six".