2133488781 has 16 divisors (see below), whose sum is σ = 3167181120. Its totient is φ = 1419420240.

The previous prime is 2133488771. The next prime is 2133488801. The reversal of 2133488781 is 1878843312.

It is not a de Polignac number, because 2133488781 - 2¹⁰ = 2133487757 is a prime.

It is a super-2 number, since 2×2133488781² = 9103548757305731922, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2133488761) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67210 + ... + 93723.

It is an arithmetic number, because the mean of its divisors is an integer number (197948820).

Almost surely, 2^2133488781 is an apocalyptic number.

It is an amenable number.

2133488781 is a deficient number, since it is larger than the sum of its proper divisors (1033692339).

2133488781 is a wasteful number, since it uses less digits than its factorization.

2133488781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161433 (or 161427 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The square root of 2133488781 is about 46189.7042748706. The cubic root of 2133488781 is about 1287.3504460214.

The spelling of 2133488781 in words is "two billion, one hundred thirty-three million, four hundred eighty-eight thousand, seven hundred eighty-one".