21455144514131 has 8 divisors (see below), whose sum is σ = 21457941039600. Its totient is φ = 21452348202912.

The previous prime is 21455144514113. The next prime is 21455144514149. The reversal of 21455144514131 is 13141544155412.

It is an interprime number because it is at equal distance from previous prime (21455144514113) and next prime (21455144514149).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21455144514131 - 2¹⁴ = 21455144497747 is a prime.

It is a super-2 number, since 2×21455144514131² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21455144214131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 294948641 + ... + 295021373.

It is an arithmetic number, because the mean of its divisors is an integer number (2682242629950).

Almost surely, 2^{21455144514131} is an apocalyptic number.

21455144514131 is a deficient number, since it is larger than the sum of its proper divisors (2796525469).

21455144514131 is a wasteful number, since it uses less digits than its factorization.

21455144514131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107125.

The product of its digits is 192000, while the sum is 41.

Adding to 21455144514131 its reverse (13141544155412), we get a palindrome (34596688669543).

The spelling of 21455144514131 in words is "twenty-one trillion, four hundred fifty-five billion, one hundred forty-four million, five hundred fourteen thousand, one hundred thirty-one".