1540324214421 has 4 divisors (see below), whose sum is σ = 2053765619232. Its totient is φ = 1026882809612.

The previous prime is 1540324214413. The next prime is 1540324214423. The reversal of 1540324214421 is 1244124230451.

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 1540324214421 - 2³ = 1540324214413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1540324214423) 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, 256720702401 + ... + 256720702406.

It is an arithmetic number, because the mean of its divisors is an integer number (513441404808).

Almost surely, 2^{1540324214421} is an apocalyptic number.

It is an amenable number.

1540324214421 is a deficient number, since it is larger than the sum of its proper divisors (513441404811).

1540324214421 is an equidigital number, since it uses as much as digits as its factorization.

1540324214421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513441404810.

The product of its (nonzero) digits is 30720, while the sum is 33.

Adding to 1540324214421 its reverse (1244124230451), we get a palindrome (2784448444872).

The spelling of 1540324214421 in words is "one trillion, five hundred forty billion, three hundred twenty-four million, two hundred fourteen thousand, four hundred twenty-one".