100531447 has 2 divisors, whose sum is σ = 100531448. Its totient is φ = 100531446.

The previous prime is 100531441. The next prime is 100531469. The reversal of 100531447 is 744135001.

It is a weak prime.

It is an emirp because it is prime and its reverse (744135001) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100531447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100531441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50265723 + 50265724.

It is an arithmetic number, because the mean of its divisors is an integer number (50265724).

Almost surely, 2^100531447 is an apocalyptic number.

100531447 is a deficient number, since it is larger than the sum of its proper divisors (1).

100531447 is an equidigital number, since it uses as much as digits as its factorization.

100531447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 100531447 is about 10026.5371390127. The cubic root of 100531447 is about 464.9796838544.

Adding to 100531447 its reverse (744135001), we get a palindrome (844666448).

The spelling of 100531447 in words is "one hundred million, five hundred thirty-one thousand, four hundred forty-seven".