2236091921 has 12 divisors (see below), whose sum is σ = 2621657088. Its totient is φ = 1901553192.

The previous prime is 2236091911. The next prime is 2236091927. The reversal of 2236091921 is 1291906322.

It is not a de Polignac number, because 2236091921 - 2⁶ = 2236091857 is a prime.

It is a super-2 number, since 2×2236091921² = 10000214158322940482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2236091927) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 173441 + ... + 185886.

It is an arithmetic number, because the mean of its divisors is an integer number (218471424).

Almost surely, 2^2236091921 is an apocalyptic number.

It is an amenable number.

2236091921 is a deficient number, since it is larger than the sum of its proper divisors (385565167).

2236091921 is a wasteful number, since it uses less digits than its factorization.

2236091921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359468 (or 359461 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 2236091921 is about 47287.3336211717. Note that the first 3 decimals coincide. The cubic root of 2236091921 is about 1307.6651534098.

The spelling of 2236091921 in words is "two billion, two hundred thirty-six million, ninety-one thousand, nine hundred twenty-one".