240105213 has 6 divisors (see below), whose sum is σ = 346818654. Its totient is φ = 160070136.

The previous prime is 240105209. The next prime is 240105277. The reversal of 240105213 is 312501042.

It can be written as a sum of positive squares in only one way, i.e., 239723289 + 381924 = 15483^2 + 618^2 .

It is not a de Polignac number, because 240105213 - 2² = 240105209 is a prime.

It is a super-3 number, since 3×240105213³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240305213) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13339170 + ... + 13339187.

It is an arithmetic number, because the mean of its divisors is an integer number (57803109).

Almost surely, 2^240105213 is an apocalyptic number.

It is an amenable number.

240105213 is a deficient number, since it is larger than the sum of its proper divisors (106713441).

240105213 is a wasteful number, since it uses less digits than its factorization.

240105213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26678363 (or 26678360 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 240105213 is about 15495.3287477227. The cubic root of 240105213 is about 621.5372993831.

Adding to 240105213 its reverse (312501042), we get a palindrome (552606255).

The spelling of 240105213 in words is "two hundred forty million, one hundred five thousand, two hundred thirteen".