540831 has 8 divisors (see below), whose sum is σ = 738864. Its totient is φ = 351680.

The previous prime is 540823. The next prime is 540851. The reversal of 540831 is 138045.

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 540831 - 2³ = 540823 is a prime.

It is a super-2 number, since 2×540831² = 584996341122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 540798 and 540807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (540851) 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, 2076 + ... + 2321.

It is an arithmetic number, because the mean of its divisors is an integer number (92358).

2⁵⁴⁰⁸³¹ is an apocalyptic number.

540831 is a deficient number, since it is larger than the sum of its proper divisors (198033).

540831 is a wasteful number, since it uses less digits than its factorization.

540831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4441.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 540831 is about 735.4121293533. The cubic root of 540831 is about 81.4742789598.

Adding to 540831 its reverse (138045), we get a palindrome (678876).

The spelling of 540831 in words is "five hundred forty thousand, eight hundred thirty-one".