540311152021 has 4 divisors (see below), whose sum is σ = 553489472844. Its totient is φ = 527132831200.

The previous prime is 540311152001. The next prime is 540311152061. The reversal of 540311152021 is 120251113045.

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 160331371396 + 379979780625 = 400414^2 + 616425^2 .

It is a cyclic number.

It is not a de Polignac number, because 540311152021 - 2¹³ = 540311143829 is a prime.

It is a super-2 number, since 2×540311152021² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (540311152001) 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 in 3 ways as a sum of consecutive naturals, for example, 6589160350 + ... + 6589160431.

It is an arithmetic number, because the mean of its divisors is an integer number (138372368211).

Almost surely, 2^540311152021 is an apocalyptic number.

It is an amenable number.

540311152021 is a deficient number, since it is larger than the sum of its proper divisors (13178320823).

540311152021 is a wasteful number, since it uses less digits than its factorization.

540311152021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13178320822.

The product of its (nonzero) digits is 1200, while the sum is 25.

Adding to 540311152021 its reverse (120251113045), we get a palindrome (660562265066).

The spelling of 540311152021 in words is "five hundred forty billion, three hundred eleven million, one hundred fifty-two thousand, twenty-one".