207228762009 has 24 divisors (see below), whose sum is σ = 324668314152. Its totient is φ = 126854522880.

The previous prime is 207228762007. The next prime is 207228762011. The reversal of 207228762009 is 900267822702.

It is an interprime number because it is at equal distance from previous prime (207228762007) and next prime (207228762011).

It can be written as a sum of positive squares in 4 ways, for example, as 39233705625 + 167995056384 = 198075^2 + 409872^2 .

It is not a de Polignac number, because 207228762009 - 2¹ = 207228762007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (207228762007) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16511244 + ... + 16523789.

It is an arithmetic number, because the mean of its divisors is an integer number (13527846423).

Almost surely, 2^207228762009 is an apocalyptic number.

It is an amenable number.

207228762009 is a deficient number, since it is larger than the sum of its proper divisors (117439552143).

207228762009 is a wasteful number, since it uses less digits than its factorization.

207228762009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33035097 (or 33035094 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The spelling of 207228762009 in words is "two hundred seven billion, two hundred twenty-eight million, seven hundred sixty-two thousand, nine".