6221851 has 4 divisors (see below), whose sum is σ = 6253632. Its totient is φ = 6190072.

The previous prime is 6221849. The next prime is 6221867. The reversal of 6221851 is 1581226.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1581226 = 2 ⋅790613.

It is a cyclic number.

It is not a de Polignac number, because 6221851 - 2¹ = 6221849 is a prime.

It is a super-2 number, since 2×6221851² = 77422859732402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6221651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15595 + ... + 15988.

It is an arithmetic number, because the mean of its divisors is an integer number (1563408).

Almost surely, 2^6221851 is an apocalyptic number.

6221851 is a deficient number, since it is larger than the sum of its proper divisors (31781).

6221851 is a wasteful number, since it uses less digits than its factorization.

6221851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31780.

The product of its digits is 960, while the sum is 25.

The square root of 6221851 is about 2494.3638467553. The cubic root of 6221851 is about 183.9246205885.

The spelling of 6221851 in words is "six million, two hundred twenty-one thousand, eight hundred fifty-one".