100440253 has 8 divisors (see below), whose sum is σ = 104437080. Its totient is φ = 96479040.

The previous prime is 100440239. The next prime is 100440323. The reversal of 100440253 is 352044001.

It can be written as a sum of positive squares in 4 ways, for example, as 31832164 + 68608089 = 5642^2 + 8283^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 100440253 - 2⁹ = 100439741 is a prime.

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 100440253.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100440203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3078 + ... + 14503.

It is an arithmetic number, because the mean of its divisors is an integer number (13054635).

Almost surely, 2^100440253 is an apocalyptic number.

It is an amenable number.

100440253 is a deficient number, since it is larger than the sum of its proper divisors (3996827).

100440253 is a wasteful number, since it uses less digits than its factorization.

100440253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17807.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 100440253 is about 10021.9884753476. The cubic root of 100440253 is about 464.8390439960.

Adding to 100440253 its reverse (352044001), we get a palindrome (452484254).

The spelling of 100440253 in words is "one hundred million, four hundred forty thousand, two hundred fifty-three".