6213381 has 16 divisors (see below), whose sum is σ = 9154944. Its totient is φ = 3728384.

The previous prime is 6213367. The next prime is 6213391. The reversal of 6213381 is 1833126.

It is a cyclic number.

It is not a de Polignac number, because 6213381 - 2⁷ = 6213253 is a prime.

It is a super-2 number, since 2×6213381² = 77212206902322, which contains 22 as substring.

6213381 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6213301) 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 15 ways as a sum of consecutive naturals, for example, 1476 + ... + 3821.

It is an arithmetic number, because the mean of its divisors is an integer number (572184).

Almost surely, 2^6213381 is an apocalyptic number.

6213381 is the 1577-th centered pentagonal number.

It is an amenable number.

6213381 is a deficient number, since it is larger than the sum of its proper divisors (2941563).

6213381 is a wasteful number, since it uses less digits than its factorization.

6213381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5340.

The product of its digits is 864, while the sum is 24.

The square root of 6213381 is about 2492.6654408484. The cubic root of 6213381 is about 183.8411219113.

It can be divided in two parts, 621 and 3381, that multiplied together give a square (2099601 = 1449²).

The spelling of 6213381 in words is "six million, two hundred thirteen thousand, three hundred eighty-one".