240634213 has 2 divisors, whose sum is σ = 240634214. Its totient is φ = 240634212.

The previous prime is 240634187. The next prime is 240634309. The reversal of 240634213 is 312436042.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 206726884 + 33907329 = 14378^2 + 5823^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-240634213 is a prime.

It is a super-2 number, since 2×240634213² = 115809648932258738, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (244634213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120317106 + 120317107.

It is an arithmetic number, because the mean of its divisors is an integer number (120317107).

Almost surely, 2^240634213 is an apocalyptic number.

It is an amenable number.

240634213 is a deficient number, since it is larger than the sum of its proper divisors (1).

240634213 is an equidigital number, since it uses as much as digits as its factorization.

240634213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 240634213 is about 15512.3890165248. The cubic root of 240634213 is about 621.9934217313.

The spelling of 240634213 in words is "two hundred forty million, six hundred thirty-four thousand, two hundred thirteen".