2133138388 has 6 divisors (see below), whose sum is σ = 3732992186. Its totient is φ = 1066569192.

The previous prime is 2133138307. The next prime is 2133138391. The reversal of 2133138388 is 8838313312.

It can be written as a sum of positive squares in only one way, i.e., 1980072004 + 153066384 = 44498^2 + 12372^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2133138388.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 266642295 + ... + 266642302.

Almost surely, 2^2133138388 is an apocalyptic number.

It is an amenable number.

2133138388 is a deficient number, since it is larger than the sum of its proper divisors (1599853798).

2133138388 is a wasteful number, since it uses less digits than its factorization.

2133138388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533284601 (or 533284599 counting only the distinct ones).

The product of its digits is 82944, while the sum is 40.

The square root of 2133138388 is about 46185.9111418190. The cubic root of 2133138388 is about 1287.2799662693.

The spelling of 2133138388 in words is "two billion, one hundred thirty-three million, one hundred thirty-eight thousand, three hundred eighty-eight".