106215646 has 4 divisors (see below), whose sum is σ = 159323472. Its totient is φ = 53107822.

The previous prime is 106215631. The next prime is 106215647. The reversal of 106215646 is 646512601.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×106215646² = 22563526910394632, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (106215647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26553910 + ... + 26553913.

It is an arithmetic number, because the mean of its divisors is an integer number (39830868).

Almost surely, 2^106215646 is an apocalyptic number.

106215646 is a deficient number, since it is larger than the sum of its proper divisors (53107826).

106215646 is an equidigital number, since it uses as much as digits as its factorization.

106215646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53107825.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 106215646 is about 10306.0975155487. The cubic root of 106215646 is about 473.5830661051.

The spelling of 106215646 in words is "one hundred six million, two hundred fifteen thousand, six hundred forty-six".