542440523 has 2 divisors, whose sum is σ = 542440524. Its totient is φ = 542440522.

The previous prime is 542440501. The next prime is 542440559. The reversal of 542440523 is 325044245.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-542440523 is a prime.

It is not a weakly prime, because it can be changed into another prime (542445523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271220261 + 271220262.

It is an arithmetic number, because the mean of its divisors is an integer number (271220262).

Almost surely, 2^542440523 is an apocalyptic number.

542440523 is a deficient number, since it is larger than the sum of its proper divisors (1).

542440523 is an equidigital number, since it uses as much as digits as its factorization.

542440523 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19200, while the sum is 29.

The square root of 542440523 is about 23290.3525735443. The cubic root of 542440523 is about 815.5502189930.

Adding to 542440523 its reverse (325044245), we get a palindrome (867484768).

The spelling of 542440523 in words is "five hundred forty-two million, four hundred forty thousand, five hundred twenty-three".