100051115 has 4 divisors (see below), whose sum is σ = 120061344. Its totient is φ = 80040888.

The previous prime is 100051097. The next prime is 100051117. The reversal of 100051115 is 511150001.

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

It is a cyclic number.

It is not a de Polignac number, because 100051115 - 2¹⁰ = 100050091 is a prime.

It is a super-2 number, since 2×100051115² = 20020451225486450, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 100051115.

It is not an unprimeable number, because it can be changed into a prime (100051117) 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, 10005107 + ... + 10005116.

It is an arithmetic number, because the mean of its divisors is an integer number (30015336).

Almost surely, 2^100051115 is an apocalyptic number.

100051115 is a deficient number, since it is larger than the sum of its proper divisors (20010229).

100051115 is an equidigital number, since it uses as much as digits as its factorization.

100051115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20010228.

The product of its (nonzero) digits is 25, while the sum is 14.

The square root of 100051115 is about 10002.5554234905. Note that the first 3 decimals coincide. The cubic root of 100051115 is about 464.2379548281.

The spelling of 100051115 in words is "one hundred million, fifty-one thousand, one hundred fifteen".