105212231 has 2 divisors, whose sum is σ = 105212232. Its totient is φ = 105212230.

The previous prime is 105212221. The next prime is 105212249. The reversal of 105212231 is 132212501.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-105212231 is a prime.

It is a super-2 number, since 2×105212231² = 22139227103994722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (105212221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52606115 + 52606116.

It is an arithmetic number, because the mean of its divisors is an integer number (52606116).

Almost surely, 2^105212231 is an apocalyptic number.

105212231 is a deficient number, since it is larger than the sum of its proper divisors (1).

105212231 is an equidigital number, since it uses as much as digits as its factorization.

105212231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 105212231 is about 10257.3013507452. The cubic root of 105212231 is about 472.0870383753.

Adding to 105212231 its reverse (132212501), we get a palindrome (237424732).

The spelling of 105212231 in words is "one hundred five million, two hundred twelve thousand, two hundred thirty-one".