6151381 has 4 divisors (see below), whose sum is σ = 6205932. Its totient is φ = 6096832.

The previous prime is 6151357. The next prime is 6151391. The reversal of 6151381 is 1831516.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 348100 + 5803281 = 590^2 + 2409^2 .

It is a cyclic number.

It is not a de Polignac number, because 6151381 - 2⁵ = 6151349 is a prime.

It is a super-2 number, since 2×6151381² = 75678976414322, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6151351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27106 + ... + 27331.

It is an arithmetic number, because the mean of its divisors is an integer number (1551483).

Almost surely, 2^6151381 is an apocalyptic number.

It is an amenable number.

6151381 is a deficient number, since it is larger than the sum of its proper divisors (54551).

6151381 is a wasteful number, since it uses less digits than its factorization.

6151381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54550.

The product of its digits is 720, while the sum is 25.

The square root of 6151381 is about 2480.1977743720. The cubic root of 6151381 is about 183.2275926511.

Adding to 6151381 its reverse (1831516), we get a palindrome (7982897).

The spelling of 6151381 in words is "six million, one hundred fifty-one thousand, three hundred eighty-one".