100431563 has 4 divisors (see below), whose sum is σ = 106339320. Its totient is φ = 94523808.

The previous prime is 100431557. The next prime is 100431571. The reversal of 100431563 is 365134001.

It is a happy number.

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

It is not a de Polignac number, because 100431563 - 2¹⁴ = 100415179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100431503) 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, 2953853 + ... + 2953886.

It is an arithmetic number, because the mean of its divisors is an integer number (26584830).

Almost surely, 2^100431563 is an apocalyptic number.

100431563 is a deficient number, since it is larger than the sum of its proper divisors (5907757).

100431563 is an equidigital number, since it uses as much as digits as its factorization.

100431563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5907756.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 100431563 is about 10021.5549192728. The cubic root of 100431563 is about 464.8256377913.

Adding to 100431563 its reverse (365134001), we get a palindrome (465565564).

The spelling of 100431563 in words is "one hundred million, four hundred thirty-one thousand, five hundred sixty-three".