542171404321541 has 2 divisors, whose sum is σ = 542171404321542. Its totient is φ = 542171404321540.

The previous prime is 542171404321387. The next prime is 542171404321601. The reversal of 542171404321541 is 145123404171245.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 445594989392641 + 96576414928900 = 21109121^2 + 9827330^2 .

It is a cyclic number.

It is not a de Polignac number, because 542171404321541 - 2²² = 542171400127237 is a prime.

It is a super-2 number, since 2×542171404321541² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 542171404321492 and 542171404321501.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (542171404221541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271085702160770 + 271085702160771.

It is an arithmetic number, because the mean of its divisors is an integer number (271085702160771).

Almost surely, 2^{542171404321541} is an apocalyptic number.

It is an amenable number.

542171404321541 is a deficient number, since it is larger than the sum of its proper divisors (1).

542171404321541 is an equidigital number, since it uses as much as digits as its factorization.

542171404321541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 537600, while the sum is 44.

Adding to 542171404321541 its reverse (145123404171245), we get a palindrome (687294808492786).

The spelling of 542171404321541 in words is "five hundred forty-two trillion, one hundred seventy-one billion, four hundred four million, three hundred twenty-one thousand, five hundred forty-one".