100051 has 4 divisors (see below), whose sum is σ = 114352. Its totient is φ = 85752.

The previous prime is 100049. The next prime is 100057. The reversal of 100051 is 150001.

100051 is nontrivially palindromic in base 11.

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 100051 - 2¹ = 100049 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (7), and also a Moran number because the ratio is a prime number: 14293 = 100051 / (1 + 0 + 0 + 0 + 5 + 1).

It is not an unprimeable number, because it can be changed into a prime (100057) 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, 7140 + ... + 7153.

It is an arithmetic number, because the mean of its divisors is an integer number (28588).

2¹⁰⁰⁰⁵¹ is an apocalyptic number.

100051 is a deficient number, since it is larger than the sum of its proper divisors (14301).

100051 is an equidigital number, since it uses as much as digits as its factorization.

100051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14300.

The product of its (nonzero) digits is 5, while the sum is 7.

The square root of 100051 is about 316.3083938184. The cubic root of 100051 is about 46.4237776961.

Adding to 100051 its reverse (150001), we get a palindrome (250052).

The spelling of 100051 in words is "one hundred thousand, fifty-one".