21152213142255 has 160 divisors (see below), whose sum is σ = 41454191116800. Its totient is φ = 10255322297088.

The previous prime is 21152213142253. The next prime is 21152213142331. The reversal of 21152213142255 is 55224131225112.

21152213142255 is a `hidden beast` number, since 2 + 1 + 1 + 5 + 221 + 3 + 1 + 422 + 5 + 5 = 666.

It is not a de Polignac number, because 21152213142255 - 2¹ = 21152213142253 is a prime.

It is a super-2 number, since 2×21152213142255² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21152213142253) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 2631195526 + ... + 2631203564.

It is an arithmetic number, because the mean of its divisors is an integer number (259088694480).

Almost surely, 2^{21152213142255} is an apocalyptic number.

21152213142255 is a deficient number, since it is larger than the sum of its proper divisors (20301977974545).

21152213142255 is a wasteful number, since it uses less digits than its factorization.

21152213142255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15595 (or 15586 counting only the distinct ones).

The product of its digits is 48000, while the sum is 36.

Adding to 21152213142255 its reverse (55224131225112), we get a palindrome (76376344367367).

The spelling of 21152213142255 in words is "twenty-one trillion, one hundred fifty-two billion, two hundred thirteen million, one hundred forty-two thousand, two hundred fifty-five".