100715855 has 4 divisors (see below), whose sum is σ = 120859032. Its totient is φ = 80572680.

The previous prime is 100715851. The next prime is 100715893. The reversal of 100715855 is 558517001.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 558517001 = 7 ⋅79788143.

It is not a de Polignac number, because 100715855 - 2² = 100715851 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100715851) 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, 10071581 + ... + 10071590.

It is an arithmetic number, because the mean of its divisors is an integer number (30214758).

Almost surely, 2^100715855 is an apocalyptic number.

100715855 is a deficient number, since it is larger than the sum of its proper divisors (20143177).

100715855 is an equidigital number, since it uses as much as digits as its factorization.

100715855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20143176.

The product of its (nonzero) digits is 7000, while the sum is 32.

The square root of 100715855 is about 10035.7289222059. The cubic root of 100715855 is about 465.2638191527.

The spelling of 100715855 in words is "one hundred million, seven hundred fifteen thousand, eight hundred fifty-five".