2291688285 has 8 divisors (see below), whose sum is σ = 3666701280. Its totient is φ = 1222233744.

The previous prime is 2291688271. The next prime is 2291688293. The reversal of 2291688285 is 5828861922.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2291688285 - 2¹³ = 2291680093 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76389595 + ... + 76389624.

It is an arithmetic number, because the mean of its divisors is an integer number (458337660).

Almost surely, 2^2291688285 is an apocalyptic number.

It is an amenable number.

2291688285 is a deficient number, since it is larger than the sum of its proper divisors (1375012995).

2291688285 is a wasteful number, since it uses less digits than its factorization.

2291688285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152779227.

The product of its digits is 1105920, while the sum is 51.

The square root of 2291688285 is about 47871.5811834119. The cubic root of 2291688285 is about 1318.4141279514.

The spelling of 2291688285 in words is "two billion, two hundred ninety-one million, six hundred eighty-eight thousand, two hundred eighty-five".