2142240709 has 32 divisors (see below), whose sum is σ = 2694348800. Its totient is φ = 1661886720.

The previous prime is 2142240691. The next prime is 2142240713. The reversal of 2142240709 is 9070422412.

It is a cyclic number.

It is not a de Polignac number, because 2142240709 - 2⁹ = 2142240197 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2142240799) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 322429 + ... + 329005.

It is an arithmetic number, because the mean of its divisors is an integer number (84198400).

Almost surely, 2^2142240709 is an apocalyptic number.

It is an amenable number.

2142240709 is a deficient number, since it is larger than the sum of its proper divisors (552108091).

2142240709 is a wasteful number, since it uses less digits than its factorization.

2142240709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6713.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 2142240709 is about 46284.3462630726. The cubic root of 2142240709 is about 1289.1083534501.

The spelling of 2142240709 in words is "two billion, one hundred forty-two million, two hundred forty thousand, seven hundred nine".