100391115 has 16 divisors (see below), whose sum is σ = 175228416. Its totient is φ = 48674400.

The previous prime is 100391099. The next prime is 100391129. The reversal of 100391115 is 511193001.

It is not a de Polignac number, because 100391115 - 2⁴ = 100391099 is a prime.

It is a super-3 number, since 3×100391115³ (a number of 25 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 100391091 and 100391100.

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, 304051 + ... + 304380.

It is an arithmetic number, because the mean of its divisors is an integer number (10951776).

Almost surely, 2^100391115 is an apocalyptic number.

100391115 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

100391115 is a deficient number, since it is larger than the sum of its proper divisors (74837301).

100391115 is a wasteful number, since it uses less digits than its factorization.

100391115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 608450.

The product of its (nonzero) digits is 135, while the sum is 21.

The square root of 100391115 is about 10019.5366659342. The cubic root of 100391115 is about 464.7632278230.

The spelling of 100391115 in words is "one hundred million, three hundred ninety-one thousand, one hundred fifteen".