10109531 has 2 divisors, whose sum is σ = 10109532. Its totient is φ = 10109530.

The previous prime is 10109521. The next prime is 10109549. The reversal of 10109531 is 13590101.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 10109531 - 2¹⁰ = 10108507 is a prime.

It is a super-2 number, since 2×10109531² = 204405234079922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (10109521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5054765 + 5054766.

It is an arithmetic number, because the mean of its divisors is an integer number (5054766).

Almost surely, 2^10109531 is an apocalyptic number.

10109531 is a deficient number, since it is larger than the sum of its proper divisors (1).

10109531 is an equidigital number, since it uses as much as digits as its factorization.

10109531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 135, while the sum is 20.

The square root of 10109531 is about 3179.5488673710. The cubic root of 10109531 is about 216.2272057679.

Adding to 10109531 its reverse (13590101), we get a palindrome (23699632).

The spelling of 10109531 in words is "ten million, one hundred nine thousand, five hundred thirty-one".