82821226 has 4 divisors (see below), whose sum is σ = 124231842. Its totient is φ = 41410612.

The previous prime is 82821223. The next prime is 82821227. The reversal of 82821226 is 62212828.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 79192201 + 3629025 = 8899^2 + 1905^2 .

It is a super-2 number, since 2×82821226² = 13718710952286152, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (82821223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20705305 + ... + 20705308.

Almost surely, 2^82821226 is an apocalyptic number.

82821226 is a deficient number, since it is larger than the sum of its proper divisors (41410616).

82821226 is a wasteful number, since it uses less digits than its factorization.

82821226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41410615.

The product of its digits is 6144, while the sum is 31.

The square root of 82821226 is about 9100.6167922839. The cubic root of 82821226 is about 435.8936593614.

It can be divided in two parts, 828212 and 26, that multiplied together give a palindrome (21533512).

The spelling of 82821226 in words is "eighty-two million, eight hundred twenty-one thousand, two hundred twenty-six".