105551231 has 2 divisors, whose sum is σ = 105551232. Its totient is φ = 105551230.

The previous prime is 105551219. The next prime is 105551233. The reversal of 105551231 is 132155501.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 105551231 - 2²⁶ = 38442367 is a prime.

It is a super-2 number, since 2×105551231² = 22282124731230722, which contains 22 as substring.

Together with 105551233, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 105551197 and 105551206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (105551233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52775615 + 52775616.

It is an arithmetic number, because the mean of its divisors is an integer number (52775616).

Almost surely, 2^105551231 is an apocalyptic number.

105551231 is a deficient number, since it is larger than the sum of its proper divisors (1).

105551231 is an equidigital number, since it uses as much as digits as its factorization.

105551231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 750, while the sum is 23.

The square root of 105551231 is about 10273.8128754616. The cubic root of 105551231 is about 472.5935255269.

The spelling of 105551231 in words is "one hundred five million, five hundred fifty-one thousand, two hundred thirty-one".