106621015 has 4 divisors (see below), whose sum is σ = 127945224. Its totient is φ = 85296808.

The previous prime is 106620979. The next prime is 106621019. The reversal of 106621015 is 510126601.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 510126601 = 1543 ⋅330607.

It is a cyclic number.

It is not a de Polignac number, because 106621015 - 2²¹ = 104523863 is a prime.

It is a super-2 number, since 2×106621015² = 22736081679260450, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (106621019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10662097 + ... + 10662106.

It is an arithmetic number, because the mean of its divisors is an integer number (31986306).

Almost surely, 2^106621015 is an apocalyptic number.

106621015 is a deficient number, since it is larger than the sum of its proper divisors (21324209).

106621015 is an equidigital number, since it uses as much as digits as its factorization.

106621015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21324208.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 106621015 is about 10325.7452515545. The cubic root of 106621015 is about 474.1847733995.

Adding to 106621015 its reverse (510126601), we get a palindrome (616747616).

The spelling of 106621015 in words is "one hundred six million, six hundred twenty-one thousand, fifteen".