106531091 has 2 divisors, whose sum is σ = 106531092. Its totient is φ = 106531090.

The previous prime is 106531069. The next prime is 106531109. The reversal of 106531091 is 190135601.

Together with next prime (106531109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-106531091 is a prime.

It is a super-2 number, since 2×106531091² = 22697746699300562, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 106531091.

It is not a weakly prime, because it can be changed into another prime (106531001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53265545 + 53265546.

It is an arithmetic number, because the mean of its divisors is an integer number (53265546).

Almost surely, 2^106531091 is an apocalyptic number.

106531091 is a deficient number, since it is larger than the sum of its proper divisors (1).

106531091 is an equidigital number, since it uses as much as digits as its factorization.

106531091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 810, while the sum is 26.

The square root of 106531091 is about 10321.3899742234. The cubic root of 106531091 is about 474.0514270016.

Adding to 106531091 its reverse (190135601), we get a palindrome (296666692).

The spelling of 106531091 in words is "one hundred six million, five hundred thirty-one thousand, ninety-one".