4221831 has 8 divisors (see below), whose sum is σ = 5960304. Its totient is φ = 2648960.

The previous prime is 4221829. The next prime is 4221851. The reversal of 4221831 is 1381224.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4221831 - 2¹ = 4221829 is a prime.

It is a super-2 number, since 2×4221831² = 35647713985122, which contains 22 as substring.

4221831 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 4221798 and 4221807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4221851) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41340 + ... + 41441.

It is an arithmetic number, because the mean of its divisors is an integer number (745038).

Almost surely, 2^4221831 is an apocalyptic number.

4221831 is a deficient number, since it is larger than the sum of its proper divisors (1738473).

4221831 is a wasteful number, since it uses less digits than its factorization.

4221831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82801.

The product of its digits is 384, while the sum is 21.

The square root of 4221831 is about 2054.7094685137. The cubic root of 4221831 is about 161.6219273704.

The spelling of 4221831 in words is "four million, two hundred twenty-one thousand, eight hundred thirty-one".