2142667509 has 4 divisors (see below), whose sum is σ = 2856890016. Its totient is φ = 1428445004.

The previous prime is 2142667489. The next prime is 2142667519. The reversal of 2142667509 is 9057662412.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2142667509 - 2⁷ = 2142667381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2142667519) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 357111249 + ... + 357111254.

It is an arithmetic number, because the mean of its divisors is an integer number (714222504).

Almost surely, 2^2142667509 is an apocalyptic number.

It is an amenable number.

2142667509 is a deficient number, since it is larger than the sum of its proper divisors (714222507).

2142667509 is an equidigital number, since it uses as much as digits as its factorization.

2142667509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 714222506.

The product of its (nonzero) digits is 181440, while the sum is 42.

The square root of 2142667509 is about 46288.9566635499. The cubic root of 2142667509 is about 1289.1939577286.

The spelling of 2142667509 in words is "two billion, one hundred forty-two million, six hundred sixty-seven thousand, five hundred nine".