540400243 has 4 divisors (see below), whose sum is σ = 550596528. Its totient is φ = 530203960.

The previous prime is 540400171. The next prime is 540400253. The reversal of 540400243 is 342004045.

It is a happy number.

540400243 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-540400243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (540400253) 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, 5098063 + ... + 5098168.

It is an arithmetic number, because the mean of its divisors is an integer number (137649132).

Almost surely, 2^540400243 is an apocalyptic number.

540400243 is a gapful number since it is divisible by the number (53) formed by its first and last digit.

540400243 is a deficient number, since it is larger than the sum of its proper divisors (10196285).

540400243 is a wasteful number, since it uses less digits than its factorization.

540400243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10196284.

The product of its (nonzero) digits is 1920, while the sum is 22.

The square root of 540400243 is about 23246.5103402640. The cubic root of 540400243 is about 814.5264254126.

Adding to 540400243 its reverse (342004045), we get a palindrome (882404288).

It can be divided in two parts, 5404002 and 43, that added together give a palindrome (5404045).

The spelling of 540400243 in words is "five hundred forty million, four hundred thousand, two hundred forty-three".