1540201224013 has 4 divisors (see below), whose sum is σ = 1540620558268. Its totient is φ = 1539781889760.

The previous prime is 1540201223933. The next prime is 1540201224019. The reversal of 1540201224013 is 3104221020451.

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 867574884969 + 672626339044 = 931437^2 + 820138^2 .

It is a cyclic number.

It is not a de Polignac number, because 1540201224013 - 2¹³ = 1540201215821 is a prime.

It is a super-2 number, since 2×1540201224013² (a number of 25 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 (1540201224019) 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, 209661618 + ... + 209668963.

It is an arithmetic number, because the mean of its divisors is an integer number (385155139567).

Almost surely, 2^{1540201224013} is an apocalyptic number.

It is an amenable number.

1540201224013 is a deficient number, since it is larger than the sum of its proper divisors (419334255).

1540201224013 is an equidigital number, since it uses as much as digits as its factorization.

1540201224013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419334254.

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 1540201224013 its reverse (3104221020451), we get a palindrome (4644422244464).

The spelling of 1540201224013 in words is "one trillion, five hundred forty billion, two hundred one million, two hundred twenty-four thousand, thirteen".