235540109 has 12 divisors (see below), whose sum is σ = 279168444. Its totient is φ = 198080064.

The previous prime is 235540103. The next prime is 235540141. The reversal of 235540109 is 901045532.

It can be written as a sum of positive squares in 2 ways, for example, as 200137609 + 35402500 = 14147^2 + 5950^2 .

It is not a de Polignac number, because 235540109 - 2¹² = 235536013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (235540103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42752 + ... + 47945.

It is an arithmetic number, because the mean of its divisors is an integer number (23264037).

Almost surely, 2^235540109 is an apocalyptic number.

It is an amenable number.

235540109 is a deficient number, since it is larger than the sum of its proper divisors (43628335).

235540109 is an equidigital number, since it uses as much as digits as its factorization.

235540109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90764 (or 90757 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 235540109 is about 15347.3160194218. The cubic root of 235540109 is about 617.5729857400.

The spelling of 235540109 in words is "two hundred thirty-five million, five hundred forty thousand, one hundred nine".