102531109 has 2 divisors, whose sum is σ = 102531110. Its totient is φ = 102531108.

The previous prime is 102531103. The next prime is 102531127. The reversal of 102531109 is 901135201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 93993025 + 8538084 = 9695^2 + 2922^2 .

It is a cyclic number.

It is not a de Polignac number, because 102531109 - 2¹¹ = 102529061 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 102531109.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102531103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51265554 + 51265555.

It is an arithmetic number, because the mean of its divisors is an integer number (51265555).

Almost surely, 2^102531109 is an apocalyptic number.

It is an amenable number.

102531109 is a deficient number, since it is larger than the sum of its proper divisors (1).

102531109 is an equidigital number, since it uses as much as digits as its factorization.

102531109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 270, while the sum is 22.

The square root of 102531109 is about 10125.7646131045. The cubic root of 102531109 is about 468.0424222509.

The spelling of 102531109 in words is "one hundred two million, five hundred thirty-one thousand, one hundred nine".