265440101 has 4 divisors (see below), whose sum is σ = 265629900. Its totient is φ = 265250304.

The previous prime is 265440047. The next prime is 265440107. The reversal of 265440101 is 101044562.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 129367876 + 136072225 = 11374^2 + 11665^2 .

It is a cyclic number.

It is not a de Polignac number, because 265440101 - 2⁶ = 265440037 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 (265440107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92786 + ... + 95603.

It is an arithmetic number, because the mean of its divisors is an integer number (66407475).

Almost surely, 2^265440101 is an apocalyptic number.

It is an amenable number.

265440101 is a deficient number, since it is larger than the sum of its proper divisors (189799).

265440101 is a wasteful number, since it uses less digits than its factorization.

265440101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189798.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 265440101 is about 16292.3325831509. The cubic root of 265440101 is about 642.6712093505.

Adding to 265440101 its reverse (101044562), we get a palindrome (366484663).

The spelling of 265440101 in words is "two hundred sixty-five million, four hundred forty thousand, one hundred one".