108400215 has 64 divisors (see below), whose sum is σ = 218234880. Its totient is φ = 44634240.

The previous prime is 108400213. The next prime is 108400217. The reversal of 108400215 is 512004801.

It is an interprime number because it is at equal distance from previous prime (108400213) and next prime (108400217).

It is not a de Polignac number, because 108400215 - 2¹ = 108400213 is a prime.

It is a super-2 number, since 2×108400215² = 23501213224092450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 108400191 and 108400200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (108400213) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 146316 + ... + 147054.

It is an arithmetic number, because the mean of its divisors is an integer number (3409920).

Almost surely, 2^108400215 is an apocalyptic number.

108400215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

108400215 is an abundant number, since it is smaller than the sum of its proper divisors (109834665).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

108400215 is a wasteful number, since it uses less digits than its factorization.

108400215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 892.

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 108400215 is about 10411.5423929406. The cubic root of 108400215 is about 476.8078327932.

The spelling of 108400215 in words is "one hundred eight million, four hundred thousand, two hundred fifteen".