540012221531 has 2 divisors, whose sum is σ = 540012221532. Its totient is φ = 540012221530.

The previous prime is 540012221491. The next prime is 540012221627. The reversal of 540012221531 is 135122210045.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 540012221531 - 2³⁰ = 538938479707 is a prime.

It is a super-2 number, since 2×540012221531² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 540012221531.

It is not a weakly prime, because it can be changed into another prime (540011221531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 270006110765 + 270006110766.

It is an arithmetic number, because the mean of its divisors is an integer number (270006110766).

Almost surely, 2^540012221531 is an apocalyptic number.

540012221531 is a deficient number, since it is larger than the sum of its proper divisors (1).

540012221531 is an equidigital number, since it uses as much as digits as its factorization.

540012221531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2400, while the sum is 26.

Adding to 540012221531 its reverse (135122210045), we get a palindrome (675134431576).

The spelling of 540012221531 in words is "five hundred forty billion, twelve million, two hundred twenty-one thousand, five hundred thirty-one".