21552015543413 has 16 divisors (see below), whose sum is σ = 22234940925120. Its totient is φ = 20877013852800.

The previous prime is 21552015543379. The next prime is 21552015543433. The reversal of 21552015543413 is 31434551025512.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21552015543413 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21552015543433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1248578 + ... + 6683036.

It is an arithmetic number, because the mean of its divisors is an integer number (1389683807820).

Almost surely, 2^{21552015543413} is an apocalyptic number.

It is an amenable number.

21552015543413 is a deficient number, since it is larger than the sum of its proper divisors (682925381707).

21552015543413 is a wasteful number, since it uses less digits than its factorization.

21552015543413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5435188.

The product of its (nonzero) digits is 360000, while the sum is 41.

Adding to 21552015543413 its reverse (31434551025512), we get a palindrome (52986566568925).

The spelling of 21552015543413 in words is "twenty-one trillion, five hundred fifty-two billion, fifteen million, five hundred forty-three thousand, four hundred thirteen".