6221243515 has 4 divisors (see below), whose sum is σ = 7465492224. Its totient is φ = 4976994808.

The previous prime is 6221243489. The next prime is 6221243521. The reversal of 6221243515 is 5153421226.

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

It is a cyclic number.

It is not a de Polignac number, because 6221243515 - 2³¹ = 4073759867 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 622124347 + ... + 622124356.

It is an arithmetic number, because the mean of its divisors is an integer number (1866373056).

Almost surely, 2^6221243515 is an apocalyptic number.

6221243515 is a deficient number, since it is larger than the sum of its proper divisors (1244248709).

6221243515 is a wasteful number, since it uses less digits than its factorization.

6221243515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1244248708.

The product of its digits is 14400, while the sum is 31.

The square root of 6221243515 is about 78874.8598413969. The cubic root of 6221243515 is about 1839.1863442326.

The spelling of 6221243515 in words is "six billion, two hundred twenty-one million, two hundred forty-three thousand, five hundred fifteen".