6215140243 has 4 divisors (see below), whose sum is σ = 6693227968. Its totient is φ = 5737052520.

The previous prime is 6215140213. The next prime is 6215140271. The reversal of 6215140243 is 3420415126.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6215140243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6215140213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 239043843 + ... + 239043868.

It is an arithmetic number, because the mean of its divisors is an integer number (1673306992).

Almost surely, 2^6215140243 is an apocalyptic number.

6215140243 is a deficient number, since it is larger than the sum of its proper divisors (478087725).

6215140243 is a wasteful number, since it uses less digits than its factorization.

6215140243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478087724.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 6215140243 is about 78836.1607576117. The cubic root of 6215140243 is about 1838.5847106404.

Adding to 6215140243 its reverse (3420415126), we get a palindrome (9635555369).

The spelling of 6215140243 in words is "six billion, two hundred fifteen million, one hundred forty thousand, two hundred forty-three".