6221631 has 16 divisors (see below), whose sum is σ = 9243360. Its totient is φ = 3696000.

The previous prime is 6221629. The next prime is 6221639. The reversal of 6221631 is 1361226.

It is a happy number.

It is not a de Polignac number, because 6221631 - 2¹ = 6221629 is a prime.

It is a super-2 number, since 2×6221631² = 77417384600322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6221598 and 6221607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6221639) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1620 + ... + 3881.

It is an arithmetic number, because the mean of its divisors is an integer number (577710).

Almost surely, 2^6221631 is an apocalyptic number.

6221631 is a deficient number, since it is larger than the sum of its proper divisors (3021729).

6221631 is a wasteful number, since it uses less digits than its factorization.

6221631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5546.

The product of its digits is 432, while the sum is 21.

The square root of 6221631 is about 2494.3197469450. The cubic root of 6221631 is about 183.9224527506.

Adding to 6221631 its reverse (1361226), we get a palindrome (7582857).

The spelling of 6221631 in words is "six million, two hundred twenty-one thousand, six hundred thirty-one".