21515414310153 has 12 divisors (see below), whose sum is σ = 31112857683648. Its totient is φ = 14327438610840.

The previous prime is 21515414310151. The next prime is 21515414310157. The reversal of 21515414310153 is 35101341451512.

21515414310153 is a `hidden beast` number, since 2 + 1 + 5 + 1 + 541 + 4 + 3 + 101 + 5 + 3 = 666.

It is not a de Polignac number, because 21515414310153 - 2¹ = 21515414310151 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21515414310151) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1347569013 + ... + 1347584978.

It is an arithmetic number, because the mean of its divisors is an integer number (2592738140304).

Almost surely, 2^{21515414310153} is an apocalyptic number.

It is an amenable number.

21515414310153 is a deficient number, since it is larger than the sum of its proper divisors (9597443373495).

21515414310153 is a wasteful number, since it uses less digits than its factorization.

21515414310153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2695154884 (or 2695154881 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 36.

Adding to 21515414310153 its reverse (35101341451512), we get a palindrome (56616755761665).

The spelling of 21515414310153 in words is "twenty-one trillion, five hundred fifteen billion, four hundred fourteen million, three hundred ten thousand, one hundred fifty-three".