2209031240 has 64 divisors (see below), whose sum is σ = 5358044160. Its totient is φ = 814821120.

The previous prime is 2209031233. The next prime is 2209031243. The reversal of 2209031240 is 421309022.

It is not an unprimeable number, because it can be changed into a prime (2209031243) 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, 813485 + ... + 816195.

It is an arithmetic number, because the mean of its divisors is an integer number (83719440).

Almost surely, 2^2209031240 is an apocalyptic number.

2209031240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2209031240 is an abundant number, since it is smaller than the sum of its proper divisors (3149012920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2209031240 is a wasteful number, since it uses less digits than its factorization.

2209031240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4302 (or 4298 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 2209031240 is about 47000.3323392505. The cubic root of 2209031240 is about 1302.3687070404.

The spelling of 2209031240 in words is "two billion, two hundred nine million, thirty-one thousand, two hundred forty".