106031821 has 8 divisors (see below), whose sum is σ = 122291840. Its totient is φ = 90049968.

The previous prime is 106031803. The next prime is 106031831. The reversal of 106031821 is 128130601.

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

It is a cyclic number.

It is not a de Polignac number, because 106031821 - 2⁵ = 106031789 is a prime.

It is a super-2 number, since 2×106031821² = 22485494129152082, 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 = 106031792 and 106031801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (106031831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68721 + ... + 70246.

It is an arithmetic number, because the mean of its divisors is an integer number (15286480).

Almost surely, 2^106031821 is an apocalyptic number.

It is an amenable number.

106031821 is a deficient number, since it is larger than the sum of its proper divisors (16260019).

106031821 is a wasteful number, since it uses less digits than its factorization.

106031821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139083.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 106031821 is about 10297.1753893968. The cubic root of 106031821 is about 473.3097018663.

The spelling of 106031821 in words is "one hundred six million, thirty-one thousand, eight hundred twenty-one".