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6381381 = 331591163
BaseRepresentation
bin11000010101111101000101
3110000012121110
4120111331011
53113201011
6344435233
7105145416
oct30257505
913005543
106381381
113669476
122178b19
131425786
14bc180d
15860ba6
hex615f45

6381381 has 16 divisors (see below), whose sum is σ = 8939520. Its totient is φ = 4043760.

The previous prime is 6381379. The next prime is 6381407. The reversal of 6381381 is 1831836.

It is not a de Polignac number, because 6381381 - 21 = 6381379 is a prime.

It is a super-2 number, since 2×63813812 = 81444046934322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6381371) 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, 4906 + ... + 6068.

It is an arithmetic number, because the mean of its divisors is an integer number (558720).

Almost surely, 26381381 is an apocalyptic number.

It is an amenable number.

6381381 is a deficient number, since it is larger than the sum of its proper divisors (2558139).

6381381 is a wasteful number, since it uses less digits than its factorization.

6381381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1256.

The product of its digits is 3456, while the sum is 30.

The square root of 6381381 is about 2526.1395448391. The cubic root of 6381381 is about 185.4833331679.

The spelling of 6381381 in words is "six million, three hundred eighty-one thousand, three hundred eighty-one".

Divisors: 1 3 31 59 93 177 1163 1829 3489 5487 36053 68617 108159 205851 2127127 6381381