100440231 has 4 divisors (see below), whose sum is σ = 133920312. Its totient is φ = 66960152.

The previous prime is 100440229. The next prime is 100440239. The reversal of 100440231 is 132044001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 132044001 = 3 ⋅44014667.

It is a cyclic number.

It is not a de Polignac number, because 100440231 - 2¹ = 100440229 is a prime.

It is a super-2 number, since 2×100440231² = 20176480006666722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 100440231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100440239) 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, 16740036 + ... + 16740041.

It is an arithmetic number, because the mean of its divisors is an integer number (33480078).

Almost surely, 2^100440231 is an apocalyptic number.

100440231 is a deficient number, since it is larger than the sum of its proper divisors (33480081).

100440231 is an equidigital number, since it uses as much as digits as its factorization.

100440231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33480080.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 100440231 is about 10021.9873777610. The cubic root of 100440231 is about 464.8390100573.

Adding to 100440231 its reverse (132044001), we get a palindrome (232484232).

The spelling of 100440231 in words is "one hundred million, four hundred forty thousand, two hundred thirty-one".