542481817 has 2 divisors, whose sum is σ = 542481818. Its totient is φ = 542481816.

The previous prime is 542481791. The next prime is 542481847. The reversal of 542481817 is 718184245.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 296493961 + 245987856 = 17219^2 + 15684^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-542481817 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 542481817.

It is not a weakly prime, because it can be changed into another prime (542481847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271240908 + 271240909.

It is an arithmetic number, because the mean of its divisors is an integer number (271240909).

Almost surely, 2^542481817 is an apocalyptic number.

It is an amenable number.

542481817 is a deficient number, since it is larger than the sum of its proper divisors (1).

542481817 is an equidigital number, since it uses as much as digits as its factorization.

542481817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 71680, while the sum is 40.

The square root of 542481817 is about 23291.2390610719. The cubic root of 542481817 is about 815.5709134131.

It can be divided in two parts, 54248 and 1817, that added together give a palindrome (56065).

The spelling of 542481817 in words is "five hundred forty-two million, four hundred eighty-one thousand, eight hundred seventeen".