540231421 has 2 divisors, whose sum is σ = 540231422. Its totient is φ = 540231420.

The previous prime is 540231379. The next prime is 540231431. The reversal of 540231421 is 124132045.

540231421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 288660100 + 251571321 = 16990^2 + 15861^2 .

It is a cyclic number.

It is not a de Polignac number, because 540231421 - 2¹⁷ = 540100349 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 540231392 and 540231401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (540231431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 270115710 + 270115711.

It is an arithmetic number, because the mean of its divisors is an integer number (270115711).

Almost surely, 2^540231421 is an apocalyptic number.

It is an amenable number.

540231421 is a deficient number, since it is larger than the sum of its proper divisors (1).

540231421 is an equidigital number, since it uses as much as digits as its factorization.

540231421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 540231421 is about 23242.8789309758. The cubic root of 540231421 is about 814.4415967423.

Adding to 540231421 its reverse (124132045), we get a palindrome (664363466).

The spelling of 540231421 in words is "five hundred forty million, two hundred thirty-one thousand, four hundred twenty-one".