542225541521 has 4 divisors (see below), whose sum is σ = 543071447844. Its totient is φ = 541379635200.

The previous prime is 542225541509. The next prime is 542225541523. The reversal of 542225541521 is 125145522245.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 444840977296 + 97384564225 = 666964^2 + 312065^2 .

It is a cyclic number.

It is not a de Polignac number, because 542225541521 - 2¹⁰ = 542225540497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (542225541523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 422952200 + ... + 422953481.

It is an arithmetic number, because the mean of its divisors is an integer number (135767861961).

Almost surely, 2^542225541521 is an apocalyptic number.

It is an amenable number.

542225541521 is a deficient number, since it is larger than the sum of its proper divisors (845906323).

542225541521 is an equidigital number, since it uses as much as digits as its factorization.

542225541521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 845906322.

The product of its digits is 160000, while the sum is 38.

The spelling of 542225541521 in words is "five hundred forty-two billion, two hundred twenty-five million, five hundred forty-one thousand, five hundred twenty-one".