109215085 has 16 divisors (see below), whose sum is σ = 149961600. Its totient is φ = 74799936.

The previous prime is 109215079. The next prime is 109215091. The reversal of 109215085 is 580512901.

It is an interprime number because it is at equal distance from previous prime (109215079) and next prime (109215091).

It is a cyclic number.

It is not a de Polignac number, because 109215085 - 2¹⁵ = 109182317 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41746 + ... + 44284.

It is an arithmetic number, because the mean of its divisors is an integer number (9372600).

Almost surely, 2^109215085 is an apocalyptic number.

It is an amenable number.

109215085 is a deficient number, since it is larger than the sum of its proper divisors (40746515).

109215085 is a wasteful number, since it uses less digits than its factorization.

109215085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3780.

The product of its (nonzero) digits is 3600, while the sum is 31.

The square root of 109215085 is about 10450.6021357623. The cubic root of 109215085 is about 477.9996104757. Note that the first 3 decimals are identical.

Adding to 109215085 its reverse (580512901), we get a palindrome (689727986).

The spelling of 109215085 in words is "one hundred nine million, two hundred fifteen thousand, eighty-five".