82251121 has 2 divisors, whose sum is σ = 82251122. Its totient is φ = 82251120.

The previous prime is 82251109. The next prime is 82251137. The reversal of 82251121 is 12115228.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81703521 + 547600 = 9039^2 + 740^2 .

It is a cyclic number.

It is not a de Polignac number, because 82251121 - 2⁵ = 82251089 is a prime.

It is a super-3 number, since 3×82251121³ (a number of 25 digits) contains 333 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 82251092 and 82251101.

It is not a weakly prime, because it can be changed into another prime (82251181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41125560 + 41125561.

It is an arithmetic number, because the mean of its divisors is an integer number (41125561).

Almost surely, 2^82251121 is an apocalyptic number.

It is an amenable number.

82251121 is a deficient number, since it is larger than the sum of its proper divisors (1).

82251121 is an equidigital number, since it uses as much as digits as its factorization.

82251121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 320, while the sum is 22.

The square root of 82251121 is about 9069.2403761285. The cubic root of 82251121 is about 434.8911887087.

Adding to 82251121 its reverse (12115228), we get a palindrome (94366349).

The spelling of 82251121 in words is "eighty-two million, two hundred fifty-one thousand, one hundred twenty-one".