240420133 has 2 divisors, whose sum is σ = 240420134. Its totient is φ = 240420132.

The previous prime is 240420107. The next prime is 240420143. The reversal of 240420133 is 331024042.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 236605924 + 3814209 = 15382^2 + 1953^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-240420133 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 240420133.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (240420143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120210066 + 120210067.

It is an arithmetic number, because the mean of its divisors is an integer number (120210067).

Almost surely, 2^240420133 is an apocalyptic number.

It is an amenable number.

240420133 is a deficient number, since it is larger than the sum of its proper divisors (1).

240420133 is an equidigital number, since it uses as much as digits as its factorization.

240420133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 240420133 is about 15505.4871900241. The cubic root of 240420133 is about 621.8089150519.

Adding to 240420133 its reverse (331024042), we get a palindrome (571444175).

The spelling of 240420133 in words is "two hundred forty million, four hundred twenty thousand, one hundred thirty-three".