21540100325143 has 8 divisors (see below), whose sum is σ = 23201087254400. Its totient is φ = 19931843139768.

The previous prime is 21540100325123. The next prime is 21540100325197. The reversal of 21540100325143 is 34152300104512.

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 21540100325143 - 2²⁵ = 21540066770711 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21540100325113) 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, 13182435123 + ... + 13182436756.

It is an arithmetic number, because the mean of its divisors is an integer number (2900135906800).

Almost surely, 2^{21540100325143} is an apocalyptic number.

21540100325143 is a deficient number, since it is larger than the sum of its proper divisors (1660986929257).

21540100325143 is a wasteful number, since it uses less digits than its factorization.

21540100325143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26364871941.

The product of its (nonzero) digits is 14400, while the sum is 31.

Adding to 21540100325143 its reverse (34152300104512), we get a palindrome (55692400429655).

The spelling of 21540100325143 in words is "twenty-one trillion, five hundred forty billion, one hundred million, three hundred twenty-five thousand, one hundred forty-three".