2209997231 has 8 divisors (see below), whose sum is σ = 2398738944. Its totient is φ = 2023932960.

The previous prime is 2209997221. The next prime is 2209997327. The reversal of 2209997231 is 1327999022.

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

It is not a de Polignac number, because 2209997231 - 2²² = 2205802927 is a prime.

It is a super-2 number, since 2×2209997231² = 9768175522055334722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2209997221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 667640 + ... + 670941.

It is an arithmetic number, because the mean of its divisors is an integer number (299842368).

Almost surely, 2^2209997231 is an apocalyptic number.

2209997231 is a deficient number, since it is larger than the sum of its proper divisors (188741713).

2209997231 is a wasteful number, since it uses less digits than its factorization.

2209997231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1338721.

The product of its (nonzero) digits is 122472, while the sum is 44.

The square root of 2209997231 is about 47010.6076433819. The cubic root of 2209997231 is about 1302.5585177124.

The spelling of 2209997231 in words is "two billion, two hundred nine million, nine hundred ninety-seven thousand, two hundred thirty-one".