2123228709 has 48 divisors (see below), whose sum is σ = 3547648000. Its totient is φ = 1198615968.

The previous prime is 2123228677. The next prime is 2123228711. The reversal of 2123228709 is 9078223212.

It is not a de Polignac number, because 2123228709 - 2⁵ = 2123228677 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123228729) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2043012 + ... + 2044050.

Almost surely, 2^2123228709 is an apocalyptic number.

It is an amenable number.

2123228709 is a deficient number, since it is larger than the sum of its proper divisors (1424419291).

2123228709 is a wasteful number, since it uses less digits than its factorization.

2123228709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1414 (or 1411 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 2123228709 is about 46078.5059328099. The cubic root of 2123228709 is about 1285.2834812908.

The spelling of 2123228709 in words is "two billion, one hundred twenty-three million, two hundred twenty-eight thousand, seven hundred nine".