540042321523 has 2 divisors, whose sum is σ = 540042321524. Its totient is φ = 540042321522.

The previous prime is 540042321509. The next prime is 540042321529. The reversal of 540042321523 is 325123240045.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 540042321523 - 2²¹ = 540040224371 is a prime.

It is not a weakly prime, because it can be changed into another prime (540042321529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 270021160761 + 270021160762.

It is an arithmetic number, because the mean of its divisors is an integer number (270021160762).

Almost surely, 2^540042321523 is an apocalyptic number.

540042321523 is a deficient number, since it is larger than the sum of its proper divisors (1).

540042321523 is an equidigital number, since it uses as much as digits as its factorization.

540042321523 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28800, while the sum is 31.

Adding to 540042321523 its reverse (325123240045), we get a palindrome (865165561568).

The spelling of 540042321523 in words is "five hundred forty billion, forty-two million, three hundred twenty-one thousand, five hundred twenty-three".