92811221 has 2 divisors, whose sum is σ = 92811222. Its totient is φ = 92811220.

The previous prime is 92811217. The next prime is 92811227. The reversal of 92811221 is 12211829.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58354321 + 34456900 = 7639^2 + 5870^2 .

It is a cyclic number.

It is not a de Polignac number, because 92811221 - 2² = 92811217 is a prime.

It is a super-2 number, since 2×92811221² = 17227845487021682, which contains 22 as substring.

It is equal to p_5370452 and since 92811221 and 5370452 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (92811227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 46405610 + 46405611.

It is an arithmetic number, because the mean of its divisors is an integer number (46405611).

Almost surely, 2^92811221 is an apocalyptic number.

It is an amenable number.

92811221 is a deficient number, since it is larger than the sum of its proper divisors (1).

92811221 is an equidigital number, since it uses as much as digits as its factorization.

92811221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576, while the sum is 26.

The square root of 92811221 is about 9633.8580537602. The cubic root of 92811221 is about 452.7587254978.

The spelling of 92811221 in words is "ninety-two million, eight hundred eleven thousand, two hundred twenty-one".