81502830052151 has 24 divisors (see below), whose sum is σ = 86538030430320. Its totient is φ = 76692384953600.

The previous prime is 81502830052123. The next prime is 81502830052187. The reversal of 81502830052151 is 15125003820518.

It is a de Polignac number, because none of the positive numbers 2^k-81502830052151 is a prime.

It is a super-2 number, since 2×81502830052151² (a number of 29 digits) contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 81502830052099 and 81502830052108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81502830055151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 797681 + ... + 12792261.

It is an arithmetic number, because the mean of its divisors is an integer number (3605751267930).

Almost surely, 2^{81502830052151} is an apocalyptic number.

81502830052151 is a deficient number, since it is larger than the sum of its proper divisors (5035200378169).

81502830052151 is a wasteful number, since it uses less digits than its factorization.

81502830052151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11994787 (or 11994734 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 41.

Adding to 81502830052151 its reverse (15125003820518), we get a palindrome (96627833872669).

The spelling of 81502830052151 in words is "eighty-one trillion, five hundred two billion, eight hundred thirty million, fifty-two thousand, one hundred fifty-one".