2381534009 has 4 divisors (see below), whose sum is σ = 2406086004. Its totient is φ = 2356982016.

The previous prime is 2381534003. The next prime is 2381534017. The reversal of 2381534009 is 9004351832.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1705690000 + 675844009 = 41300^2 + 25997^2 .

It is a cyclic number.

It is not a de Polignac number, because 2381534009 - 2⁴ = 2381533993 is a prime.

It is a super-2 number, since 2×2381534009² = 11343408472047224162, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2381534009.

It is not an unprimeable number, because it can be changed into a prime (2381534003) 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, 12275852 + ... + 12276045.

It is an arithmetic number, because the mean of its divisors is an integer number (601521501).

Almost surely, 2^2381534009 is an apocalyptic number.

It is an amenable number.

2381534009 is a deficient number, since it is larger than the sum of its proper divisors (24551995).

2381534009 is an equidigital number, since it uses as much as digits as its factorization.

2381534009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24551994.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 2381534009 is about 48800.9631974616. The cubic root of 2381534009 is about 1335.4232380885.

The spelling of 2381534009 in words is "two billion, three hundred eighty-one million, five hundred thirty-four thousand, nine".