2231520817 has 8 divisors (see below), whose sum is σ = 2287982592. Its totient is φ = 2175156000.

The previous prime is 2231520803. The next prime is 2231520839. The reversal of 2231520817 is 7180251322.

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

It is a cyclic number.

It is not a de Polignac number, because 2231520817 - 2²³ = 2223132209 is a prime.

It is a super-3 number, since 3×2231520817³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2231520847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23548 + ... + 70834.

It is an arithmetic number, because the mean of its divisors is an integer number (285997824).

Almost surely, 2^2231520817 is an apocalyptic number.

It is an amenable number.

2231520817 is a deficient number, since it is larger than the sum of its proper divisors (56461775).

2231520817 is a wasteful number, since it uses less digits than its factorization.

2231520817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48479.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 2231520817 is about 47238.9756133640. The cubic root of 2231520817 is about 1306.7734859556.

The spelling of 2231520817 in words is "two billion, two hundred thirty-one million, five hundred twenty thousand, eight hundred seventeen".