540242431 has 2 divisors, whose sum is σ = 540242432. Its totient is φ = 540242430.

The previous prime is 540242401. The next prime is 540242449. The reversal of 540242431 is 134242045.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 540242431 - 2²⁹ = 3371519 is a prime.

It is a super-2 number, since 2×540242431² = 583723768505579522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 540242396 and 540242405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (540242401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 270121215 + 270121216.

It is an arithmetic number, because the mean of its divisors is an integer number (270121216).

Almost surely, 2^540242431 is an apocalyptic number.

540242431 is a deficient number, since it is larger than the sum of its proper divisors (1).

540242431 is an equidigital number, since it uses as much as digits as its factorization.

540242431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 540242431 is about 23243.1157765047. The cubic root of 540242431 is about 814.4471295200.

Adding to 540242431 its reverse (134242045), we get a palindrome (674484476).

The spelling of 540242431 in words is "five hundred forty million, two hundred forty-two thousand, four hundred thirty-one".