82251815228 has 36 divisors (see below), whose sum is σ = 158555012616. Its totient is φ = 37307028000.

The previous prime is 82251815213. The next prime is 82251815251.

82251815228 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×82251815228² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44078 + ... + 407978.

It is an arithmetic number, because the mean of its divisors is an integer number (4404305906).

Almost surely, 2^82251815228 is an apocalyptic number.

It is an amenable number.

82251815228 is a deficient number, since it is larger than the sum of its proper divisors (76303197388).

82251815228 is a wasteful number, since it uses less digits than its factorization.

82251815228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364394 (or 364381 counting only the distinct ones).

The product of its digits is 204800, while the sum is 44.

The spelling of 82251815228 in words is "eighty-two billion, two hundred fifty-one million, eight hundred fifteen thousand, two hundred twenty-eight".