540403214521 has 4 divisors (see below), whose sum is σ = 540858483792. Its totient is φ = 539947945252.

The previous prime is 540403214513. The next prime is 540403214587. The reversal of 540403214521 is 125412304045.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 540403214521 - 2³ = 540403214513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (540403214821) 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, 227632855 + ... + 227635228.

It is an arithmetic number, because the mean of its divisors is an integer number (135214620948).

Almost surely, 2^540403214521 is an apocalyptic number.

It is an amenable number.

540403214521 is a deficient number, since it is larger than the sum of its proper divisors (455269271).

540403214521 is a wasteful number, since it uses less digits than its factorization.

540403214521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455269270.

The product of its (nonzero) digits is 19200, while the sum is 31.

Adding to 540403214521 its reverse (125412304045), we get a palindrome (665815518566).

The spelling of 540403214521 in words is "five hundred forty billion, four hundred three million, two hundred fourteen thousand, five hundred twenty-one".