540142120522 has 4 divisors (see below), whose sum is σ = 810213180786. Its totient is φ = 270071060260.

The previous prime is 540142120499. The next prime is 540142120523. The reversal of 540142120522 is 225021241045.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 225021241045 = 5 ⋅45004248209.

It can be written as a sum of positive squares in only one way, i.e., 494981195401 + 45160925121 = 703549^2 + 212511^2 .

It is not an unprimeable number, because it can be changed into a prime (540142120523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 135035530129 + ... + 135035530132.

Almost surely, 2^540142120522 is an apocalyptic number.

540142120522 is a deficient number, since it is larger than the sum of its proper divisors (270071060264).

540142120522 is a wasteful number, since it uses less digits than its factorization.

540142120522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270071060263.

The product of its (nonzero) digits is 6400, while the sum is 28.

Adding to 540142120522 its reverse (225021241045), we get a palindrome (765163361567).

The spelling of 540142120522 in words is "five hundred forty billion, one hundred forty-two million, one hundred twenty thousand, five hundred twenty-two".