100206531 has 8 divisors (see below), whose sum is σ = 148454160. Its totient is φ = 66804336.

The previous prime is 100206521. The next prime is 100206541. The reversal of 100206531 is 135602001.

100206531 is a `hidden beast` number, since 10 + 0 + 2 + 0 + 653 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (100206521) and next prime (100206541).

It is not a de Polignac number, because 100206531 - 2⁵ = 100206499 is a prime.

It is a super-2 number, since 2×100206531² = 20082697710107922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (100206511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1855650 + ... + 1855703.

It is an arithmetic number, because the mean of its divisors is an integer number (18556770).

Almost surely, 2^100206531 is an apocalyptic number.

100206531 is a deficient number, since it is larger than the sum of its proper divisors (48247629).

100206531 is an equidigital number, since it uses as much as digits as its factorization.

100206531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3711362 (or 3711356 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 100206531 is about 10010.3212236172. The cubic root of 100206531 is about 464.4782076220.

Adding to 100206531 its reverse (135602001), we get a palindrome (235808532).

The spelling of 100206531 in words is "one hundred million, two hundred six thousand, five hundred thirty-one".