106215231 has 8 divisors (see below), whose sum is σ = 141669040. Its totient is φ = 70785792.

The previous prime is 106215227. The next prime is 106215247. The reversal of 106215231 is 132512601.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 106215231 - 2² = 106215227 is a prime.

It is a super-2 number, since 2×106215231² = 22563350592766722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 106215198 and 106215207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (106215211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10671 + ... + 18063.

It is an arithmetic number, because the mean of its divisors is an integer number (17708630).

Almost surely, 2^106215231 is an apocalyptic number.

106215231 is a deficient number, since it is larger than the sum of its proper divisors (35453809).

106215231 is an equidigital number, since it uses as much as digits as its factorization.

106215231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12185.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 106215231 is about 10306.0773818170. The cubic root of 106215231 is about 473.5824493183.

Adding to 106215231 its reverse (132512601), we get a palindrome (238727832).

The spelling of 106215231 in words is "one hundred six million, two hundred fifteen thousand, two hundred thirty-one".