540843631 has 4 divisors (see below), whose sum is σ = 548915992. Its totient is φ = 532771272.

The previous prime is 540843623. The next prime is 540843647. The reversal of 540843631 is 136348045.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 540843631 - 2³ = 540843623 is a prime.

It is a super-2 number, since 2×540843631² = 585023666386528322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (540843601) 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, 4036080 + ... + 4036213.

It is an arithmetic number, because the mean of its divisors is an integer number (137228998).

Almost surely, 2^540843631 is an apocalyptic number.

540843631 is a deficient number, since it is larger than the sum of its proper divisors (8072361).

540843631 is an equidigital number, since it uses as much as digits as its factorization.

540843631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8072360.

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 540843631 is about 23256.0450420960. The cubic root of 540843631 is about 814.7491322673.

The spelling of 540843631 in words is "five hundred forty million, eight hundred forty-three thousand, six hundred thirty-one".