21502322151 has 16 divisors (see below), whose sum is σ = 28770593280. Its totient is φ = 14284540800.

The previous prime is 21502322141. The next prime is 21502322159. The reversal of 21502322151 is 15122320512.

It is not a de Polignac number, because 21502322151 - 2⁵ = 21502322119 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21502322159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1241316 + ... + 1258518.

It is an arithmetic number, because the mean of its divisors is an integer number (1798162080).

Almost surely, 2^21502322151 is an apocalyptic number.

21502322151 is a deficient number, since it is larger than the sum of its proper divisors (7268271129).

21502322151 is a wasteful number, since it uses less digits than its factorization.

21502322151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18646.

The product of its (nonzero) digits is 1200, while the sum is 24.

Adding to 21502322151 its reverse (15122320512), we get a palindrome (36624642663).

The spelling of 21502322151 in words is "twenty-one billion, five hundred two million, three hundred twenty-two thousand, one hundred fifty-one".